Honkai Star Rail Bailu Build Guide 4.3 – Best Relics, Light Cones & Teams

Honkai Star Rail Bailu Build Guide 4.3 — your complete reference for building the High Elder of the Vidyadhara into the strongest healer she can be. Bailu is a standard 5-star Lightning Abundance character who has been in HSR since day one. She is one of the most reliable healers in the game with a unique reactive healing mechanic, a team-wide AoE heal, and a one-time ally revival that no other standard healer can replicate. In 4.3, she remains a fully viable sustain option for any team that needs a dependable healer.

TL;DR – Bailu Quick Build Overview

• Element: Lightning | Path: Abundance
• Role: Primary healer with reactive sustain and ally revival
• Best Relic Set: Warrior Goddess of Sun and Thunder (4-piece)
• Alternative Relic Set: Passerby of Wandering Cloud (4-piece)
• Best Ornament: Fleet of the Ageless
• Best Light Cone: Night of Fright (Huohuo’s signature)
• Best F2P Light Cone: Post-Op Conversation (4-star)
• Best Teams: Any DPS + Bailu as sustain in Memory of Chaos and story content
• Stat Priority: HP (5000+) → Outgoing Healing → SPD → Energy Regeneration Rate
• Trace Priority: Talent → Ultimate → Skill → Basic ATK

Bailu Overview – Who Is She?

Bailu is the High Elder of the Vidyadhara, a dragon-descended lineage on the Xianzhou Luofu. She is a standard 5-star character obtainable from the Stellar Warp banner. She follows the Path of Abundance and deals Lightning damage, though her damage output is purely secondary to her support role.

Her entire kit is built around one concept: keeping allies alive through healing that activates outside of her turns. Her signature mechanic is Invigoration — a reactive buff she applies to teammates that triggers a heal automatically the moment that ally is struck by an enemy. This means Bailu provides healing throughout the entire enemy turn, not just when she takes her own turn. In content where bosses fire off multi-hit AoE attacks, Invigoration acts as a constant safety net that prevents allies from dying between Bailu’s turns.

Her other unique feature is a one-time ally revival: if an Invigorated ally receives a fatal blow, they are brought back to life with HP restored. This revival can only happen once per battle, but it is the only revival mechanic available on a standard banner healer, making Bailu uniquely valuable in high-difficulty content where one-shot scenarios are common.

In 4.3, Bailu is not the top healer in the game — Huohuo, Lingsha, and Gallagher all bring additional team utility beyond healing. But Bailu’s raw healing volume is excellent, she works in any team that needs pure sustain, and as a standard character she is accessible to every player who has built a reasonable account.

Bailu Kit and Skills Explained

Basic ATK – Gourdful of Elixir

Deals Lightning damage to a single enemy equal to 50% of Bailu’s ATK. Low priority — Bailu’s Basic ATK deals negligible damage and contributes nothing to her support role. However, it does generate 1 Skill Point, making it the right play on turns when her Skill is not needed and energy is not yet ready for Ultimate. Use it to keep Skill Points available for the rest of the team.

Skill – Singing Among Clouds

Heals a single targeted ally for an amount based on Bailu’s Max HP, then bounces healing to two additional random allies for a reduced amount each. At max Skill level, the primary target is healed for a substantial portion of Bailu’s Max HP, and the two bounce heals cover secondary targets for slightly less. This is Bailu’s main sustain tool for turns where one specific ally is critically low. The randomness of the bounce targets is a minor weakness — you cannot control which of the remaining allies receive the extra heals.

Ultimate – Felicitous Thunderleap

Heals all allies simultaneously for an amount based on Bailu’s Max HP. After healing, she applies Invigoration to all non-Invigorated allies. Allies who are already Invigorated have their Invigoration extended by 1 turn (up to a maximum of 2 turns). Invigoration is Bailu’s most important mechanic — when an Invigorated ally takes damage from an enemy, they immediately receive a reactive heal equal to a percentage of Bailu’s Max HP. This can trigger twice per Invigoration application. Use Ultimate as often as possible to keep the entire team Invigorated at all times.

Talent – Aquatic Benediction

This is the heart of Bailu’s kit and governs both Invigoration’s healing values and her revival mechanic. While a teammate is Invigorated and gets hit by an enemy, they are immediately healed for up to 5.4% of Bailu’s Max HP plus a flat amount. This can trigger up to 2 times per Invigoration application (3 times after unlocking the A4 bonus trace). The Talent also contains the revival mechanic: if an Invigorated ally would be killed by a fatal blow, they are instead revived with HP equal to 18% of Bailu’s Max HP plus a flat amount. This can only occur once per battle. Maxing the Talent is the highest priority for Bailu because it directly controls both of these healing values.

Key Bonus Traces

• A2 – Vidyadhara Catechism: When Bailu heals an ally beyond their Max HP cap (i.e., they were already at full HP), that ally’s Max HP increases by 10% for 2 turns. A passive buff that activates naturally when Bailu overheals, which happens frequently in fights where the team is generally healthy. Unlock first.
• A4 – Saint’s Boon: Invigoration can now trigger 3 times per application instead of 2. A direct increase to Bailu’s reactive healing frequency per Ultimate cycle. A significant upgrade — unlock second.
• A6 – Healer’s Heart: Characters with Invigoration take 10% reduced damage. A universally active damage mitigation buff for the entire team as long as Ultimate uptime is maintained. Massively underestimated — it effectively makes Bailu’s Invigoration a pseudo-shield on top of healing. Unlock third.

Bailu Best Light Cones in 4.3

1. Night of Fright (Best in Slot)

This is Huohuo’s signature Light Cone but it is also the best-in-slot option for Bailu and all other Abundance healers. It increases Energy Regeneration Rate by 12–20% (scaling with superimposition), allowing Bailu to cycle her Ultimate more frequently and maintain Invigoration uptime more easily. When any ally uses their Ultimate, Night of Fright heals the ally with the lowest HP percentage for 10% of their Max HP. It also stacks up to 5 times of 2.4% ATK boost on healed allies, passively buffing the team’s damage output. The combination of energy regen, reactive healing, and ATK buff makes it the strongest Light Cone for Bailu in any endgame scenario.

2. Time Waits for No One (Signature – Premium Option)

Bailu’s own signature Light Cone. It increases Max HP by 18% and Outgoing Healing by 12%, directly boosting Invigoration’s healing values. Its secondary effect records Bailu’s healing output and periodically deals damage to a random enemy equal to a portion of that recorded value. The damage contribution is minor but not nothing in longer fights. A solid option if you own it, though Night of Fright outperforms it in most compositions.

3. Post-Op Conversation (Best F2P – 4-Star)

The best free Light Cone for Bailu. Obtainable from the Nameless Glory Battle Pass or events. It increases Energy Regeneration Rate by 12–20%, helping Bailu cycle Ultimate faster. It also increases the Outgoing Healing of her Ultimate by 16–32%, directly boosting the AoE heal from Felicitous Thunderleap. Both bonuses are highly relevant and make this cone competitive with premium options at high superimposition. An excellent pick for players who don’t have Night of Fright.

4. Quid Pro Quo (F2P – Forgotten Hall Shop)

Obtainable from the in-game Forgotten Hall shop. When Bailu’s energy is below 50%, she regenerates 8 energy for a random ally each turn. This helps fuel energy-hungry DPS characters’ Ultimates passively, which is especially useful alongside characters like Jingliu or Dan Heng Imbibitor Lunae. A niche but freely accessible option.

5. Shared Feeling (4-Star)

Increases Outgoing Healing and regenerates energy for all allies when Bailu uses her Skill. A simple and accessible 4-star pick that covers both of Bailu’s needs in a single slot. Use this while farming for better options.

Bailu Best Relics in 4.3

Best Relic Set – Warrior Goddess of Sun and Thunder (4-Piece)

This is Bailu’s best-in-slot relic set in 4.3. The 2-piece bonus gives 12% SPD to the wearer. The 4-piece bonus is what makes it exceptional: whenever Bailu heals an ally, she gains the Gentle Rain buff for 2 turns. While Gentle Rain is active, Bailu’s SPD increases by 6% and all allies gain 15% CRIT DMG. Since Bailu heals constantly — through Skill, Ultimate, and Invigoration reactive heals — Gentle Rain is active essentially 100% of the time. A consistent 15% team-wide CRIT DMG boost from the healer slot is one of the most efficient offensive contributions any sustain unit provides in the current meta.

Alternative Relic Set – Passerby of Wandering Cloud (4-Piece)

The classic healer relic set. The 2-piece gives 10% Outgoing Healing. The 4-piece recovers 1 Skill Point at the start of battle — a small but useful economy boost that frees up SP for DPS characters in the early turns. A reliable and consistent option if you don’t have good Warrior Goddess pieces yet, or in teams where CRIT DMG is already covered by other supports.

Alternative Relic Set – Sacerdos’ Relived Ordeal (4-Piece)

When Bailu uses Skill or Ultimate on a single ally, that ally gains 18% CRIT DMG for 2 turns, stacking up to 2 times (36% total). Bailu’s Skill targets a single ally, so she can maintain full stack uptime on her main DPS. However, her Ultimate targets all allies rather than one, so the Sacerdos stack only refreshes from her Skill. This set requires more active management than Warrior Goddess but offers a strong single-target CRIT DMG buff in focused hypercarry compositions.

2-Piece Mixing Option

Running 2-piece Warrior Goddess of Sun and Thunder with 2-piece Passerby of Wandering Cloud combines SPD and Outgoing Healing bonuses. A reliable foundation while farming a clean 4-piece Warrior Goddess set with strong sub-stats.

Best Planar Ornament – Fleet of the Ageless

Gives 12% Max HP from the 2-piece bonus, directly boosting all of Bailu’s HP-scaling heals. When Bailu’s SPD reaches 120 or higher, all allies gain 8% ATK. Both bonuses are consistently active — more HP means stronger Skill, Ultimate, and Invigoration heals, and the ATK buff benefits your entire team passively. The Fleet of the Ageless is Bailu’s top ornament in virtually every team.

Alternative Ornament – Broken Keel

Gives 8% Effect RES. When Bailu’s Effect RES reaches 30% or higher, all allies gain 10% CRIT DMG. A solid alternative if your sub-stats already cover the 30% Effect RES threshold. Useful in teams where Fleet of the Ageless’s ATK buff is less valuable and you need more CRIT DMG amplification instead.

Bailu Stat Priority and Relic Main Stats

Target Stats

• Max HP: Bailu’s Skill, Ultimate, and Invigoration heals all scale off her Max HP. More HP equals more healing on every ability. Target 5000+ Max HP, aiming higher with good relic sub-stats.
• Outgoing Healing: Directly multiplies all of her healing output. Second priority after hitting an HP threshold.
• SPD: 120+ to activate Fleet of the Ageless’s ATK buff for the team. Higher SPD also means more frequent turns for Skill and Ultimate use, keeping Invigoration active across more cycles.
• Energy Regeneration Rate: Helps cycle Ultimate faster for more frequent Invigoration application and team-wide heals. Especially valuable if using Night of Fright or Post-Op Conversation.

Relic Main Stat Priority

• Head: HP (fixed)
• Hands: ATK (fixed)
• Body: HP% or Outgoing Healing — both are valid. HP% gives more raw healing volume; Outgoing Healing gives a healing multiplier. HP% is generally preferred since all of Bailu’s heals already scale from HP.
• Feet: HP% or SPD. SPD if you need the Fleet of the Ageless bonus or faster cycling; HP% if survivability is the priority.
• Planar Sphere: HP%
• Link Rope: Energy Regeneration Rate or HP%

Sub-stats to prioritize: HP%, SPD, Energy Regeneration Rate, Effect RES (to reach the Broken Keel threshold if using that ornament). Avoid CRIT Rate, CRIT DMG, ATK%, and Break Effect entirely — all are wasted stats on Bailu.

Bailu Best Teams in 4.3

Best Team – Any DPS + 2 Supports + Bailu

Bailu’s greatest strength is her flexibility. She slots into virtually any team that needs a healer without requiring specific allies or element synergies. Her Invigoration’s reactive healing works against any enemy type, and her revival passive is always available regardless of team composition. The three examples below show her in strong compositions across different content types.

Strong Team – Jingliu + Sunday + Bailu + Pela

Jingliu needs consistent HP drain management since her Spectral Transmigration state takes HP from allies. Bailu’s Invigoration and Skill keep everyone’s HP topped up through the drain cycles. Sunday handles action advance and energy for Jingliu. Pela provides DEF shred. Bailu handles all sustain and keeps the team above the thresholds Jingliu requires.

Strong Team – Jing Yuan + Robin + Tingyun + Bailu

Jing Yuan benefits from Bailu’s high healing volume during long boss fights where Lightning-Lord is accumulating stacks. Robin amplifies all follow-up damage. Tingyun provides ATK and energy. Bailu keeps the whole team alive and contributes 15% team-wide CRIT DMG through Warrior Goddess, making her an offensive contributor from the sustain slot.

Strong Team – Clara + Sunday + Sparkle + Bailu

Clara is one of Bailu’s best DPS partners. Clara draws all enemy aggro, and Bailu’s Invigoration heals Clara reactively every time she is hit. This keeps Clara alive through the constant barrage of enemy attacks that Clara’s kit relies on. Sunday provides action advance and energy. Sparkle handles SP generation and CRIT DMG buffs. Bailu completes the team as the natural sustain choice.

Budget Team – Any DPS + Pela + Tingyun + Bailu

The most accessible endgame team structure for newer players. Any built main DPS is supported by Pela’s DEF reduction, Tingyun‘s ATK buff and energy, and Bailu’s healing. All three supports are free and highly effective. This team can clear all story content and a reasonable amount of Memory of Chaos with a well-built DPS unit.

Other Teammates Worth Considering

• Blade — Blade loses HP constantly from his own skills. Bailu’s Invigoration keeps him in a healthy range to keep triggering his mechanics without dying to self-damage.
• Kafka — DoT DPS who benefits from Bailu keeping the team alive in extended DoT fights where enemies may deal chip damage across multiple turns.
• Dan Heng Imbibitor Lunae — Energy-hungry DPS. Bailu’s Invigoration uptime pairs with Quid Pro Quo energy support if used in her Light Cone slot, keeping DHIL’s Ultimate cycling.
• Argenti — Another high Ultimate cost DPS who benefits from Bailu’s healing keeping him alive through tough boss phases while cycling his Ultimate frequently.

Bailu Eidolons – Are They Worth It?

As a standard 5-star character, Bailu’s Eidolons accumulate naturally over time through standard Warps and pity milestone rewards on limited banners. Her Eidolons are modest upgrades rather than transformative changes.

• E1 – Ambrosial Aqua: If an Invigorated ally’s HP is at maximum when Invigoration expires, that ally regenerates 8 Energy. A useful passive that can help energy-hungry DPS characters reach their Ultimate thresholds faster, especially in fights where Bailu’s healing keeps everyone at full HP between enemy turns. Minor but consistently helpful.
• E2 – Pot of Slumbering Dragon: After using Ultimate, Bailu’s Outgoing Healing increases by 15% for 2 turns. A straightforward healing boost during the turns immediately after Ultimate — the turns where she is most likely to use Skill for targeted follow-up heals. A clean upgrade.
• E4 – Aquakinesis: When Bailu heals an ally with her Skill, the healed ally’s damage dealt increases slightly for a few turns. A minor offensive contribution from the healer slot. Not impactful in isolation but welcome as a passive bonus over time.
• E6 – Crimson Lotus Bloom: Invigoration can now trigger one additional time per application and Bailu’s healing range increases. Together with the A4 trace, this pushes Invigoration to 4 total trigger activations per application — a significant increase to reactive healing output per Ultimate cycle. The most meaningful Eidolon for raw healing volume.

None of Bailu’s Eidolons are so impactful that they are worth actively chasing. Accumulate them passively over time through normal play.

Bailu Trace Priority

1. Talent — Controls Invigoration’s reactive healing values and the revival mechanic. Both scale with Talent level. Max this first and always.
2. Ultimate — Higher Ultimate level increases the AoE heal from Felicitous Thunderleap. Second priority since this is her main proactive healing tool.
3. Skill — More HP restored on the primary Skill target and the bounce heals. Third priority.
4. Basic ATK — No priority. Bailu’s Basic ATK is purely an SP-recovery tool and deals negligible damage.

For bonus traces, unlock A4 (Saint’s Boon — adds a 3rd Invigoration trigger) first, then A6 (Healer’s Heart — 10% damage reduction for Invigorated allies), then A2 (Vidyadhara Catechism — Max HP boost on overheal). A6 is significantly undervalued — a permanent 10% damage reduction for all Invigorated allies is a substantial survivability buff that changes how durable your team feels.

Bailu Rotation Guide – How to Play Her

Bailu’s rotation is simple and forgiving. Your core goal is to keep Invigoration active on all allies at all times and use Skill reactively when an ally drops low.

1. Use Technique before battle to apply Invigoration to all allies for the first turn of combat. This means Invigoration is already up before the first enemy attack.
2. On Bailu’s first turn in battle, if Invigoration is still active from the Technique, use Basic ATK to generate SP. Save Ultimate for the second turn when Invigoration is about to expire.
3. Use Ultimate whenever it is ready to refresh Invigoration across all allies and deliver the AoE heal. This is your highest priority action. Never delay Ultimate when an ally needs the heal.
4. Use Skill on any turn where a specific ally is critically low and Ultimate is not yet ready. Target the ally in the most danger for the primary heal and let the bounce heals cover secondary targets.
5. Use Basic ATK on any turn where the team is healthy, Invigoration is active, and Ultimate is not ready. This generates Skill Points for the rest of the team.
6. Maintain this rhythm: Ultimate → Basic ATK/Skill as needed → Ultimate → repeat. The goal is maximum Invigoration uptime, which means faster Ultimate cycling through Night of Fright or Post-Op Conversation is highly valuable.

Is Bailu Worth Building in 4.3?

Yes — especially for players who obtained her from standard Warps or as a pity milestone reward. As a standard character, Bailu is universally accessible and provides reliable healing that works in any team without requiring specific synergies.

She is not the strongest healer in the meta. Huohuo provides energy regeneration and greater utility, Lingsha contributes offensive damage alongside healing, and Gallagher is a free unit who outperforms her in break team compositions. However, Bailu’s revival mechanic is genuinely unique among standard healers and her Invigoration damage reduction from A6 is stronger than it looks. She is a dependable choice for players who need a healer and have not yet obtained the premium limited options.

If you are building a team from scratch and Bailu is your available healer, invest in her fully. She will carry you through Memory of Chaos and Apocalyptic Shadow reliably. For team-building ideas with other sustain options, check our guides on Huohuo, Gallagher, and Luocha.

Final Thoughts

Bailu is a dependable, easy-to-build healer who has been a reliable foundation for teams since the very first day of Honkai: Star Rail. Build her for Max HP first, run Warrior Goddess of Sun and Thunder relics with Fleet of the Ageless ornament, and equip Night of Fright or Post-Op Conversation as her Light Cone. Max her Talent first for Invigoration healing and the revival passive, then Ultimate for the AoE heal. Don’t sleep on the A6 trace — the 10% damage reduction for Invigorated allies is a passive team-wide survivability buff that makes her teams genuinely more durable. She is not flashy, but she gets the job done every single time.