SUNDAY
Build Guide – Best Relics, Light Cone & Teams
☀ SS TIER SUPPORT ☀The High Priest of Penacony · Master of Action & Advance
Sunday is a 5-star Imaginary Harmony character from Penacony, the dreamscape world ruled by the Family’s Oak and Dream Tide. Once the central antagonist of the Penacony arc and the Family’s High Priest, Sunday joins the Trailblazer as a support who stands alone as the most versatile single-target Harmony support in Honkai: Star Rail. He is the gold standard for hypercarry and summon-based teams in HSR 4.0, continuing to anchor top-tier compositions across all endgame modes.
Sunday’s kit is built around a three-pillar support system: his Skill grants 100% Action Advance to an ally and their Summon simultaneously (unique to Sunday — no other Harmony support can do this), his Ultimate applies “The Beatified” — a 3-turn buff granting CRIT DMG scaled off Sunday’s own CRIT DMG plus restoring 20% of the target’s Max Energy, and his Talent grants +20% CRIT Rate to Skill targets for 3 turns (the highest CRIT Rate buff any support can give). He is SP-neutral to SP-positive and provides Debuff Cleanse via his A6 trace, making him remarkably self-sufficient.
Core Mechanics Explained
Best Light Cones
A Grounded Ascent
⭐⭐⭐⭐⭐ Signature — Best in Slot
Why it’s #1: Sunday’s signature and far his best option. S1 effects: After using Skill or Ultimate on one ally, Sunday regenerates 6–8 Energy (scaling per superimposition) and the ally gains 1 “Hymn” stack for 3 turns (max 3 stacks, each granting +15–24% DMG). After every 2 Skill/Ultimate uses on the same ally, recovers 1 Skill Point. At S1, the Hymn stacks cap at 3×+15% = +45% DMG bonus on top of Sunday’s existing kit, and the SP generation makes Sunday SP-positive, transforming team Skill Point economy.
The energy self-regen from the LC solves Sunday’s energy problem without needing ERR substats, freeing all substats for CRIT DMG. The SP generation is particularly transformative for Phainon, DHIL, and Mydei teams who are naturally SP-hungry. The only LC where Sunday goes from great to exceptional.
But the Battle Isn’t Over
⭐⭐⭐⭐⭐ Standard — Best F2P 5-StarBest Non-Signature Option: Bronya’s standard banner signature provides +10% ERR for Sunday, restores 1 SP after using Ultimate, and increases the next action-taker’s DMG by +30% for 1 turn. The SP recovery on Ultimate mirrors Sunday’s signature’s SP-positive effect at a lower frequency. The ERR solves Sunday’s energy rotation without substat investment. Available permanently on the standard banner, making it accessible without pulling limited banners. A very solid second-choice that keeps most of Sunday’s value intact.
Earthly Escapade
⭐⭐⭐⭐⭐ Sparkle’s LC — CRIT DMG OptionCRIT-Focused Alternative: Grants Sunday +10% ERR and +25% CRIT DMG. When Mask of Comedy and Tragedy is triggered (by using a Skill), all allies gain +10% CRIT Rate and +28% CRIT DMG for 3 turns. The team-wide CRIT buff is excellent when it procs, but Sunday struggles to generate the Skill Points needed to keep Mask reliably active — making the uptime less consistent than it appears. Best in teams where SP generation is not an issue. Worth using if you own it from Sparkle but prioritize But the Battle Isn’t Over otherwise.
Past and Future
⭐⭐⭐⭐ F2P Best-in-SlotBest Accessible 4-Star: When Sunday uses Skill, the next action-taking ally gains +16–24% DMG for 1 turn (scales per superimposition, S5 best). At S5 this is a free +24% DMG for the DPS after Sunday advances them — significant and free. Pairs naturally with Sunday’s Skill-based Action Advance playstyle. Highly recommended as a zero-cost-to-build option while saving for his signature. Can be obtained from the Herta Store.
Carve the Moon, Weave the Clouds
⭐⭐⭐⭐ Rotating Buff LCRotating Stat Boosts: At the start of each cycle, randomly grants all allies either +10% ATK, +8% CRIT Rate, or +12% CRIT DMG. While the randomness is a weakness, all three effects benefit a hypercarry DPS. The CRIT DMG option synergizes with Sunday’s The Beatified CRIT DMG scaling. A decent option if you have good copies but cannot access Past and Future or But the Battle Isn’t Over.
Dance! Dance! Dance!
⭐⭐⭐⭐ Action Advance VariantWheelchair Build Enabler: When Sunday uses Ultimate, all allies’ actions advance forward by 16–24%. Primary use case is in “Wheelchair Sunday” high-SPD builds where Sunday aims for 160+ SPD and uses Eagle of Twilight Line for compounding advance. In standard -1 SPD builds this LC adds less value since Sunday’s Skill already advances one ally fully. Best specifically for speed-focused team setups; not recommended for standard builds.
☀ Light Cone Priority
Sunday’s signature A Grounded Ascent is by far his best option — the SP-positive economy it enables is genuinely transformative and worth more than an Eidolon in most teams. However, unlike some characters whose signature is mandatory, But the Battle Isn’t Over (standard 5-star) is a compelling and permanently accessible alternative. For truly F2P players, Past and Future at S5 covers most of Sunday’s buffing needs while you save for his signature on a future rerun. Sunday notably does not need his signature to be SS Tier — he works excellently with accessible options.
Best Relic Sets
4-Piece Cavity Relics
Why It’s BIS: This set was designed specifically for Sunday’s playstyle. The 4-piece bonus stacks every time Sunday uses Skill or Ultimate on the same target — after one Skill and one Ultimate, the DPS carries a free +36% CRIT DMG buff. Stacked on top of Sunday’s The Beatified CRIT DMG scaling (30% of Sunday’s CRIT DMG), Hymn stacks from Signature LC, and the Talent +20% CRIT Rate, the total buff package is extraordinary. The 2-piece SPD bonus also simplifies SPD tuning. Absolutely use this whenever possible.
When to Use: In “Wheelchair Sunday” builds targeting 160+ SPD, Eagle of Twilight’s 4-piece action advance compounds with the SPD advantage to give Sunday more turns — approaching 3 Skill uses per cycle. This is a niche setup requiring 168+ in-combat SPD with Dance! Dance! Dance! or 184+ SPD without it. The reward is Sunday acting almost as frequently as or slightly behind a very fast DPS, providing near-constant advance and buffs. Extremely stat-demanding but powerful for players with perfect relic sets.
When to Use: If you cannot obtain a good 4-piece Sacerdos’ set, running two 2-piece SPD sets maintains Sunday’s critical SPD tuning advantage. The loss is the +36% CRIT DMG stack — meaningful but not catastrophic. Recommended as a stop-gap while farming Sacerdos’. You can also mix Sacerdos’ 2-piece with Wavestrider Captain 2-piece for +16% CRIT DMG from 2-piece alone.
Planar Ornaments
Why It’s #1: Sunday is almost never the first character in lineup — meaning this planar ornament provides a free +12% ATK buff to the main DPS passively. The ERR +5% also contributes to faster Ultimate cycling. In ATK-scaling DPS teams (Phainon, Mydei, Jingliu, Seele), the +12% ATK amplifies the DPS more than any other available planar ornament provides to Sunday. The combination of energy and direct DPS amplification makes this the optimal choice in most teams.
When to Use: In teams with Imaginary DPS characters (Phainon, DHIL, Dr. Ratio), this Planar Ornament provides a free +10% DMG bonus for all Imaginary allies in addition to ERR. Since Sunday is himself Imaginary, if the main DPS is also Imaginary (Phainon especially), this can edge out Lushaka depending on whether the ATK% or flat DMG% bonus is more effective. Requires running Imaginary-element DPS to activate.
When to Use: Requires acquiring 30% total Effect RES — Sunday’s traces provide some naturally, and 12% from substats bridges the gap. When activated, the team-wide +10% CRIT DMG is a passive benefit on top of Sunday’s existing buff package. A strong option for players who want CRIT DMG amplification on all characters simultaneously. Particularly good in teams with CRIT-scaling supports (like Robin) benefiting from the CRIT DMG bonus too.
When to Use: In Wheelchair Sunday builds where he needs to act first, this ornament’s 50% action advance on battle entry ensures he moves before the DPS on turn 1 — applying The Beatified setup on the very first turn. Synergises with SPD substats and Eagle of Twilight Line. Unnecessary in standard -1 SPD builds where Sunday acts after the DPS anyway. Niche but impactful for speed-tuned compositions.
☀ Relic Farming Priority
Farm Sacerdos’ Relived Ordeal from Cavern of Corrosion: Path of Elixir Seekers — it’s one of the strongest dedicated support sets in the game and has no real competitor for Sunday’s standard build. For Planar Ornaments, farm Lushaka, the Sunken Seas from Simulated Universe as your first choice in most teams. If running Phainon or other Imaginary DPS, consider farming Penacony, Land of the Dreams instead. Avoid farming Sprightly Vonwacq unless specifically building a Wheelchair Sunday.
Stat Priorities
Main Stats
Target Stats
Speed Tuning — The −1 SPD Rule
Sunday’s most important stat relationship is his SPD relative to the main DPS. The optimal setup — called “−1 SPD” — ensures: DPS acts first → Sunday uses Skill on DPS → DPS acts again immediately → Sunday uses Skill again → continuous loop. This doubles the DPS’s effective turns per cycle.
Substat Priority
- CRIT DMG — Sunday’s CRIT DMG directly scales The Beatified buff. Every 100% additional CRIT DMG Sunday has translates to approximately 30% more CRIT DMG on his buffed DPS. Aim for 200%+ total CRIT DMG — this is Sunday’s most impactful personal stat by a wide margin. Prioritize CRIT DMG body piece, CRIT DMG substats first.
- SPD — Sunday needs to hit exactly −1 SPD relative to his DPS target. Sacerdos’ Relived Ordeal’s 4-piece bonus helps (+6% SPD from 2-piece) but SPD substats remain important. Always prioritize SPD needed for the −1 tuning before investing in other offensive substats.
- Effect RES — Aim for 50%+ total Effect RES. Sunday’s traces provide some naturally. Effect RES prevents debuffs from interrupting his buff rotation — critical because if Sunday is Frozen or Imprisoned, The Beatified expires and the DPS loses their buff window. Also activates Broken Keel’s team CRIT DMG bonus at 30%+.
- HP% / DEF% — Survivability stats. Sunday must remain alive to keep The Beatified active — if he dies, The Beatified is immediately dispelled (stated in his Ultimate description). Don’t neglect these entirely, especially in Apocalyptic Shadow where AoE attacks can threaten supports.
- ERR (via Rope) — Get ERR from Link Rope rather than substats. ERR substat rolls are weak value compared to CRIT DMG or SPD. Sunday’s A4 trace grants 25 Energy at battle start, and his Signature LC provides 6–8 Energy per Skill/Ultimate use — together making ERR substats largely redundant at higher investment levels.
☀ CRIT DMG Investment Priority
Sunday’s CRIT DMG is unusual — he doesn’t deal damage himself, yet his CRIT DMG stat directly translates into the DPS’s buffer. At 200% CRIT DMG on Sunday, his Beatified target gains approximately 72% CRIT DMG (30% × 200% + 12% = 72%) from the Ultimate alone, before the Sacerdos’ 4-piece stacks add further 36% CRIT DMG. This means Sunday’s personal CRIT DMG investment multiplies through to his DPS’s output — making body CRIT DMG% and CRIT DMG substats genuinely the most impactful farming priority for Sunday.
Trace Priority
- Skill — “Benison of Paper and Rites”
The Action Advance and DMG boost are Sunday’s primary contribution. Higher Skill levels increase the base DMG boost percentage and can affect the Summon bonus. Priority #1 — upgrade first and max as early as possible. - Ultimate — “Ode to Caress and Cicatrix”
Applies The Beatified, restores Energy, and grants CRIT DMG scaling from Sunday’s own CRIT DMG. Higher Ultimate levels increase the CRIT DMG transfer percentage (base 30%) and base CRIT DMG added (base +12%). Upgrade second — every level meaningfully increases the buff transferred to The Beatified target. - Talent — “Gleaming of Dawn”
Governs the +20% CRIT Rate buff applied when using Skill. Higher levels have diminishing returns on an already-fixed 20% buff, but unlocking the Talent is mandatory for this effect. Upgrade third — level value is lower than Skill and Ultimate but the Talent must be unlocked at Lv.1 for the CRIT Rate effect to function. - Basic Attack — “Transcendence”
Lowest priority. Sunday almost never uses Basic Attack in endgame — his rotation is Skill-focused with Ultimate used as soon as available. Upgrading Basic Attack provides negligible benefit. Save materials for Skill and Ultimate levels.
Major Traces — Unlock These First
A2 — “Cantillation on Paths Ahead”: When using Ultimate, if the Energy restored to the target is less than 40, the restored amount is increased to 40. This trace ensures Sunday’s Ultimate always provides at least 40 Energy regardless of the target’s Max Energy — critical for low-energy characters (like Topaz at 90 max energy, who receives a full Skill’s worth). Unlock first.
A4 — “Benediction of Anamnesis”: When battle begins, Sunday regenerates 25 Energy. This starting energy bonus combined with an ERR rope means Sunday can use his Ultimate on the very first or second turn, applying The Beatified before the DPS begins their primary damage rotation. Transformative for opening burst timing. Unlock second.
A6 — “Credo of Morning Bell”: When Sunday uses Skill, cleanses 1 debuff from the target. Mirrors Bronya’s Skill effect. In Apocalyptic Shadow where enemies apply Freeze, Imprisonment, and other harmful debuffs, this passive cleanse is invaluable for maintaining uninterrupted DPS rotations. It activates automatically on every Skill use — zero additional effort required. Unlock third.
Best Team Compositions
☀ Aglaea / Summon Core — Sunday’s Best Team
The premier showcase team for Sunday’s unique Summon synergy. Aglaea is a Lightning Remembrance DPS who operates through her Summon, Garmentmaker. Sunday is the only support who can advance both Aglaea and Garmentmaker simultaneously — and his Skill grants +80% DMG instead of the standard +30% when targeting a character with a Summon. This turns Aglaea into a near-unstoppable force with continuous action advance and massive damage boosts.
Robin provides team-wide DMG% and CRIT buffs alongside another action advance in her Concerto Ultimate state, creating an almost infinite turn loop in MoC: Aglaea acts → Sunday Skill (Aglaea + Garmentmaker advance) → Garmentmaker acts → Robin Concerto advance → Aglaea acts again. This pseudo-infinite loop allows Garmentmaker to act multiple times within the first cycle, dramatically accelerating Aglaea’s stack generation and burst damage.
Huohuo provides healing, ATK buffs, and Energy restoration for the entire team — with her Energy restoration ensuring Sunday and Robin maintain their Ultimate rotation while Aglaea’s Garmentmaker gets extra attacks. This team consistently clears MoC 12-1 in 3–4 cycles and is one of the strongest compositions in HSR 4.0.
☀ Phainon Hypercarry — Premium Damage
The highest-ceiling single-target hypercarry composition in HSR 4.0. Sunday is one of Phainon’s best-in-slot supports — his CRIT Rate buff (+20%) addresses Phainon’s most critical weakness (his best builds have few natural CRIT Rate sources), while his Action Advance generates Coreflame stacks and gives Phainon more turns for Kindling accumulation in his enhanced state.
Phainon with Wavestrider Captain relics receives +40% ATK during his enhanced state plus buffs from Sunday’s Skill, The Beatified CRIT DMG, and Tribbie’s RES PEN and Zone. The combination of these multiplicative layers — Sunday’s CRIT Rate/DMG, Tribbie’s +24% All-Type RES PEN and 30% DMG Taken, and Phainon’s own kit synergy — creates enormous burst numbers during Phainon’s 8-turn enhanced state.
Huohuo provides healing, ATK buffs to all allies, and energy regeneration keeping Sunday’s Ultimate active for consistent Beatified uptime. Note: Tribbie can be replaced with Remembrance Trailblazer or Pela for more accessible team options.
☀ Jing Yuan — Classic Sunday Home
The team that defined Sunday’s initial meta impact. Jing Yuan’s Lightning-Lord was historically the biggest weakness of the character — too slow and easily CC’d. Sunday solves both problems simultaneously: his Skill advances both Jing Yuan and the Lightning-Lord at once (only Sunday can do this), and his A6 trace cleanses any debuffs that would freeze or imprison Jing Yuan.
With Sunday, Jing Yuan’s Lightning-Lord can attack 4–5 times per rotation rather than 2–3, dramatically increasing AoE Lightning DMG output. Sparkle adds another action advance and SP generation for continuous Skill use, while Robin provides DMG% and CRIT amplification. Huohuo sustains the team and provides Energy restoration. Use Sunday at −1 SPD relative to Jing Yuan’s SPD for optimal turn order.
☀ Permansor (Dan Heng IL) — Summon Shield Build
A unique composition leveraging Permansor’s Souldragon summon to unlock Sunday’s full Summon potential. Permansor’s Souldragon can be attached to any Bondmate target — meaning even a character without their own Summon can receive Sunday’s full +80% DMG bonus from Skill by pairing with Permansor. This unlocks Sunday’s +80% DMG modifier for the entire team.
Furthermore, Souldragon’s Additional DMG scales off the Bondmate’s stats — meaning Sunday’s buffs directly amplify Souldragon’s damage as well. Sunday advances Permansor (with Souldragon advancing simultaneously), Tribbie provides RES PEN and Zone amplification, and Anaxa or Robin covers the fourth slot for additional buffs or damage. This team is particularly effective in Apocalyptic Shadow where Permansor’s sustained shield and Souldragon’s consistent DPS shine.
☀ Sunday Dual DPS Enabler
Even for characters that don’t use traditional Energy (like Feixiao and Acheron), Sunday’s 100% Action Advance remains powerful. Feixiao’s Ultimate doesn’t use Energy in the traditional sense, but her damage windows still benefit enormously from Sunday’s advance enabling double-action turns, his CRIT Rate buff closing her CRIT Rate gap, and his CRIT DMG Beatified buff stacking with Robin’s team-wide amplification.
Robin and Sunday create a powerful double-Harmony buffer core where Robin’s Concerto advances all allies and Sunday’s Skill targets Feixiao specifically for double-turn. Note: Sunday’s Energy restoration via Ultimate is wasted on Feixiao (who doesn’t use Energy) — but his Action Advance and CRIT buffs more than compensate. Replace Robin with Tribbie for a different but equally powerful buff profile.
☀ Budget Sunday Team
A fully accessible F2P team that proves Sunday’s worth without premium characters. Sunday’s kit is complete at E0 — his Action Advance, CRIT Rate buff, The Beatified CRIT DMG, and SP-neutral economy all work from E0S0. Remembrance Trailblazer (completely free) provides True DMG amplification and CRIT DMG buffs via Mem’s Memory Zone, synergising strongly with Sunday’s CRIT DMG focus.
Choose any primary hypercarry DPS — Phainon benefits enormously from Sunday’s CRIT Rate buff, Seele and Jingliu are classic Sunday partners from earlier patches who remain strong. Gallagher provides sustain via Break-assisted healing and off-turn attacks. With Past and Future at S5 on Sunday, this team clears all endgame content comfortably. Upgrade Sunday’s Light Cone to But the Battle Isn’t Over whenever possible for better energy consistency.
Eidolons Guide
| Eidolon | Name & Effect | Priority |
|---|---|---|
| E0 | Full base kit — 100% Action Advance for character + Summon, +30%/+80% DMG Skill, The Beatified CRIT DMG + Energy restore, +20% CRIT Rate Talent, SP-neutral rotation, A6 debuff cleanse. Complete and SS Tier at E0. Does not require any Eidolons to perform at the top of the meta. | SS Tier |
| E1 | “Candlelight in Spring” — When Sunday uses Skill, the target character ignores 16% of enemies’ DEF when dealing damage, and their summon ignores 40% of enemies’ DEF (if applicable). Lasts 2 turns.
In Summon teams (Aglaea, Jing Yuan), the 40% DEF ignore for Summons is extremely powerful — effectively a massive damage multiplier for the Summon specifically. In non-Summon hypercarry teams, 16% DEF ignore is respectable but smaller. Signature LC provides more total value than E1 for most players — prioritize S1 first unless you are specifically building for Summon teams. |
Good Value |
| E2 | “Dawn Prayer Illuminates” — After the first use of Ultimate in each battle, recovers 2 Skill Points. The DMG dealt by “The Beatified” also increases by 30%.
The 2 SP on first Ultimate is useful for SP-hungry teams but only triggers once per battle, making it less impactful than continuous SP generation. The +30% DMG to The Beatified is a meaningful buff that stacks multiplicatively with Sunday’s existing +30% from The Beatified state itself. Strongest in long fights where the Beatified target deals sustained damage. Weaker in short burst windows. |
Moderate Value |
| E3 | “Bless the Bowed Head” — Ultimate Level +2 (up to Lv.15), Basic ATK Level +1 (up to Lv.10). Increases Ultimate’s CRIT DMG transfer percentage and base bonus. Meaningful for the CRIT DMG buff scaling but a pure numerical increase rather than a new mechanic. Lower priority than E1 and E2. | Optional |
| E4 | “Starlit Prayer Descends” — At the start of each of Sunday’s turns, he regenerates 8 Energy. This Energy generation amounts to roughly 1 extra Ultimate every 3 turns in standard rotation, tightening The Beatified uptime. Functions primarily as a stepping stone toward E6 — limited impact on its own but enables more consistent Ultimate cycling without ERR rope. | Stepping Stone |
| E6 | “Reverence for Eternity” — The Talent’s CRIT Rate buff becomes stackable up to 3 times and lasts 4 turns. When Sunday uses his Ultimate, can also apply the Talent’s CRIT Rate boost to the target (in addition to Skill). When CRIT Rate exceeds 100%, every 1% excess CRIT Rate converts to 2% CRIT DMG. At E6 Sunday can stack up to +60% CRIT Rate on the DPS target — and excess CRIT Rate converts to a bonus CRIT DMG multiplier. Massively powerful for DPS with moderate natural CRIT Rate, pushing them to near-guaranteed crits on every hit with CRIT DMG bonuses piling on top. | Whale Tier |
☀ Eidolon Investment Guide
Sunday’s recommended investment path is E0S1 (E0 with Signature Light Cone) for most players. His Signature LC provides more consistent value than E1 for standard hypercarry teams, and Sunday at E0S1 is genuinely one of the strongest support configurations in the game. If you’re investing beyond E0S1, E1S1 is recommended specifically for players running Summon-based DPS (Aglaea, Jing Yuan) — the 40% Summon DEF ignore is disproportionately powerful in that context. E2 and beyond offer progressively smaller gains relative to cost.
How to Play Sunday
Core Rotation
- Use Technique before battle — applies a 50% DMG boost to the first Skill target for 2 turns. Use Skill on the DPS on your first turn to extend this bonus through their opening attacks.
- Sunday starts with 25 Energy from A4 trace. With ERR rope (or Signature LC), use Ultimate immediately on the main DPS to apply The Beatified and restore Energy — setting up the buff before the DPS begins their primary damage rotation. Aim to use Ultimate on turn 1 or turn 2 at the latest.
- After applying The Beatified, use Skill on The Beatified target every turn — advancing them immediately. This recovers 1 SP each time (SP-neutral rotation). The DPS gets a double turn: their natural turn + Sunday’s advance.
- Maintain The Beatified by re-applying Ultimate every 3 of Sunday’s turns (before it expires). The Beatified is the source of most of Sunday’s CRIT DMG buff — never let it lapse during the DPS’s peak damage window.
- Re-apply Skill each turn after Ultimate refresh. The Sacerdos’ 4-piece stacks stack separately from Skill and Ultimate use — after one Skill and one Ultimate on the same turn, the DPS carries both stacks of Sacerdos’ CRIT DMG bonus (+36% total).
- For Summon teams: Sunday’s Skill advances both character and Summon simultaneously. After Sunday’s Skill, the Summon acts first (usually), then the character gets their advance. Plan the sequence for maximum Summon actions per cycle.
Key Situational Decisions
- When to use Basic Attack vs Skill: Use Skill whenever possible. Use Basic Attack only if you desperately need to save SP for another character. Sunday’s Skill is his core function — every Skill cast advances the DPS, maintains CRIT Rate buff, stacks Sacerdos’, and triggers Signature LC energy + SP.
- When The Beatified expires: The Beatified’s duration decreases at the start of Sunday’s turns. If Sunday acts frequently (high SPD), The Beatified expires faster in real turns. In high-SPD setups, refresh Ultimate every 2–3 Sunday turns rather than waiting the full 3.
- Multi-target fights: Keep The Beatified on your primary DPS — even if there are multiple enemies or you’re tempted to shift focus, Sunday’s single-target buff package is optimized for one DPS. Resist re-casting Ultimate on different targets during a fight (unless the primary DPS has already used their burst and the fight continues).
- Cleanse timing (A6): Sunday’s A6 Skill cleanse triggers automatically whenever he uses Skill. If the DPS is debuffed (Frozen, Imprisoned), use Skill immediately to cleanse — the action advance and debuff removal combined restore the DPS to full combat efficiency instantly.
☀ Sunday vs Bronya — Key Differences
Players upgrading from Bronya should note the key operational differences: (1) Sunday’s The Beatified decreases at the start of his turns, not the DPS’s turns — meaning high-SPD Sunday expires the buff faster. (2) Sunday’s cleanse is on Skill (same as Bronya), so it works identically. (3) Unlike Bronya, Sunday cannot use Skill on Harmony-path characters for action advance — the effect is blocked on other Harmony supports. (4) Sunday provides Energy via Ultimate while Bronya does not, making him significantly better for Energy-hungry hypercarries. The two characters are architecturally similar but Sunday’s Energy provision and Summon synergy make him a meaningful upgrade across all hypercarry team types.
Should You Pull Sunday?
✅ Pull If:
- You own or plan to pull any hypercarry DPS — Sunday fits into virtually every non-Break, non-DoT single-DPS team
- You own Aglaea, Jing Yuan, or Topaz — Sunday dramatically elevates Summon-based DPS beyond any other support option
- You own Phainon, Mydei, DHIL, or Seele — classic hypercarry characters who maximally benefit from Sunday’s CRIT Rate + CRIT DMG + Action Advance
- You need a SP-neutral to SP-positive support — rare and valuable for teams with multiple Skill-hungry characters
- You want a universally applicable, future-proof Harmony support who remains relevant across new character releases
- You lack a strong action-advance support (no Bronya or Sparkle) and want the best available option
- You want Debuff Cleanse on a support — A6’s passive cleanse removes the need for a dedicated cleanser in many teams
⚠️ Consider Skipping If:
- You primarily run Break, DoT, or FUA teams — Sunday provides minimal value to Ruan Mei teams, Acheron, or FUA compositions compared to dedicated supports
- You already own Bronya and Sparkle and your hypercarry teams are already optimally buffed — Sunday would be a luxury upgrade rather than a necessity
- Your DPS roster doesn’t include Energy-hungry characters — Sunday’s Ultimate energy restore is wasted on Acheron and Feixiao who don’t use traditional Energy
- You’re saving resources for an upcoming DPS or the other SS-Tier supports that better fit your current account composition
- You have no Summon-based DPS and have Tribbie or Robin covering team buffs adequately — Sunday’s advantage narrows without Summons in the team
Final Verdict: Sunday is the gold standard of single-target action-advance support in Honkai: Star Rail 4.0 and has been since his initial release. His triple-buff package — 100% Action Advance + CRIT Rate + CRIT DMG + Energy — is unique in scope and no other Harmony support provides all four simultaneously. For players who run hypercarry or Summon-based teams, he’s essentially irreplaceable. His versatility, SP economy, and debuff-cleanse utility make him one of the safest long-term investments in the game. Consistently SS Tier across all game modes for the teams that want him.
Sunday vs Other SS Tier Supports
vs Tribbie (Quantum Harmony): Tribbie provides team-wide RES PEN and AoE amplification; Sunday provides single-target advance, CRIT, and energy. They are complements — many top-tier teams run both (Phainon + Sunday + Tribbie, Aglaea + Sunday + Tribbie). In AoE content and dual-DPS teams, Tribbie can edge ahead; in single-target hypercarry, Sunday is generally superior. Best together.
vs Robin (Wind Harmony): Robin provides team-wide DMG% and CRIT buffs in Concerto state plus action advance for all allies. Sunday provides single-target advance, CRIT Rate, energy, and Summon advance. Robin excels in multi-DPS and follow-up teams; Sunday excels in single-target hypercarry and Summon teams. Frequently used together (Sunday + Robin) — they’re complementary, not competitive.
vs Bronya (Wind Harmony): Sunday is a comprehensive upgrade over Bronya in most scenarios — he provides everything Bronya does (100% Action Advance, Skill-based debuff cleanse, SP neutrality) plus Energy restoration and stronger CRIT DMG scaling. The main remaining advantage of Bronya is higher Skill-to-Skill frequency potential in a few niche setups. For most players already owning Bronya, Sunday is a significant upgrade worth pulling on rerun.
vs Huohuo (Wind Abundance): Huohuo provides team-wide Energy restoration, healing, and ATK buffs — a sustain-oriented support. She and Sunday frequently appear together in hypercarry teams because their roles don’t overlap: Sunday advances the DPS and provides CRIT, Huohuo sustains the team and restores energy. They’re partners, not alternatives.