Hydro Catalyst

Barbara

Shining Idol

TierB
RolesHealer · Support
Release1.0

Mondstadt's idol and deaconess is a free, HP-scaling Hydro healer. Her Skill heals the active character over time (and on every hit when she is on-field), her Burst fully patches up the party, and her Catalyst attacks apply Hydro constantly. Outclassed by modern healers, she remains a reliable budget option and a handy Hydro applicator for Bloom teams.

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Barbara

Weapons

Thrilling Tales of Dragon Slayers BiS
· HP%
Free 3-star with HP% that passes +48% ATK to the next character (R5).
On switching, the incoming character gains +24% ATK for 10s (once every 20s at R1, 48% at R5).
Everlasting Moonglow
5★ · HP%
Big healing bonus and HP%, if you have it spare.
+10% Healing Bonus; Normal Attacks gain DMG from Max HP and restore Energy after a Burst.
Prototype Amber
4★ · HP%
Craftable: HP% and team Energy/healing after her Burst.
Craftable: after a Burst, restores 12 Energy over 6s and heals the party for 4% HP every 2s.
Favonius Codex
4★ · Energy Recharge
Particles for teammates if she spends time on-field.
CRIT hits have a 60% chance to generate particles that restore 6 Energy (once every 12s).

Artifacts

Ocean-Hued Clam ×4
Best to farm: healing bonus plus bubble damage from her healing.
Set effects
2pHealing Bonus +15%.
4pHealing creates a Sea-Dyed Foam that stores healing for 3s, then bursts for 90% of it as DMG (up to 30,000 healing stored).
Maiden Beloved ×4
More pure healing; only if you already have it from Viridescent farming.
Set effects
2pHealing Bonus +15%.
4pUsing a Skill or Burst increases healing received by all party members by 20% for 10s.
Song of Days Past ×4
Turns her big Burst heal into bonus hits for the active DPS.
Set effects
2pHealing Bonus +15%.
4pHealing is recorded for 6s, then the active character's next 5 hits deal extra DMG equal to 8% of the recorded healing (up to 15,000).
Ocean-Hued Clam ×2
Maiden Beloved ×2
Two Healing Bonus pieces while farming.
Set effects
2pHealing Bonus +15%.
2pHealing Bonus +15%.

Main stats

Sands of Eon
HP%
Goblet of Eonothem
HP%
Circlet of Logos
Healing Bonus / HP%

Substat priority

1HP% 2HP 3Energy Recharge

Stat targets

  • As much HP as possible (25,000–30,000+)
  • No real ER requirement: she should not need her Burst every rotation
  • Level her to 90 for more HP

Talent priority

Elemental Skill
Elemental Burst
Normal Attack

Weapons

Sacrificial Fragments BiS
4★ · Elemental Mastery
Highest EM secondary stat.
Elemental Skill hits have a 40% chance to reset the Skill's CD (once every 30s).
Wandering Evenstar
4★ · Elemental Mastery
EM plus an ATK share for the team.
Every 10s, grants ATK equal to 24% of Elemental Mastery, and 30% of that bonus to the party.
Mappa Mare
4★ · Elemental Mastery
Craftable EM option.
Triggering a reaction grants +8% Elemental DMG for 10s (max 2 stacks).
Magic Guide
· Elemental Mastery
Free 3-star EM fallback.
+12% DMG against opponents affected by Hydro or Electro.

Artifacts

Gilded Dreams ×4
Pure EM for Bloom damage.
Set effects
2pElemental Mastery +80.
4pAfter a reaction, gain +14% ATK per party member of the same element and +50 Elemental Mastery per member of another element for 8s (once every 8s).
Flower of Paradise Lost ×4
Boosts the Bloom reactions she triggers herself.
Set effects
2pElemental Mastery +80.
4pBloom, Hyperbloom and Burgeon DMG +40% and Lunar-Bloom DMG +10%, boosted by 25% per stack when triggering them (max 4 stacks, 10s).
Instructor ×4
Budget option with a small team EM buff.
Set effects
2pElemental Mastery +80.
4pTriggering an Elemental Reaction gives all party members +120 Elemental Mastery for 8s.

Main stats

Sands of Eon
Elemental Mastery
Goblet of Eonothem
Elemental Mastery
Circlet of Logos
Elemental Mastery / Healing Bonus

Substat priority

1Elemental Mastery 2HP% 3Energy Recharge

Stat targets

  • Elemental Mastery 600–800+
  • Some HP% so her healing still covers the team

Talent priority

Elemental Skill
Normal Attack
Elemental Burst

In Nilou teams, every Bloom triggered by Barbara becomes a Bountiful Core that scales with Nilou's HP and the trigger's EM, so full EM is worth it.

Teams

Recommended teams

Nilou Bloom (budget)

Nilou
Barbara
Collei
Traveler (Dendro)

Only Hydro and Dendro: Barbara heals and applies Hydro while Collei and the Dendro Traveler apply Dendro.

Raiden with healer

Raiden Shogun
Yelan
Kaedehara Kazuha
Barbara

A free healer slot for Raiden: Barbara's off-field loop keeps the team healthy without taking field time.

Guide

How to play

How she works

  • Let the Show Begin♪ (Skill) creates a Melody Loop for 15s: it heals the active character every 5s, heals the party on each of her Normal Attack hits (4× on Charged Attacks), and applies Wet to the active character and to enemies it touches. It generates no particles.
  • Encore extends the loop by 1s (up to 5s) whenever the active character picks up particles.
  • Shining Miracle♪ (Burst, 80 Energy) is a big party-wide heal for emergencies; it does not need to be cast every rotation.

Rotation

  1. E before swapping to your DPS for passive healing.
  2. Keep Q for when the party is low.
  3. As an on-field Hydro applicator (Bloom), chain Normal Attacks and Charged Attacks inside her loop.

The Wet status she puts on the active character can get them Frozen or Electro-Charged by enemy attacks: be careful against Cryo and Electro enemies.

Strengths

  • Free character with a strong emergency heal
  • Easy to build: HP% everywhere
  • Constant Hydro application from her Catalyst attacks
  • C6 revives a fallen teammate once every 15 minutes

Weaknesses

  • Offers no buffs beyond healing (C2's Hydro DMG aside)
  • Her 15s Skill loop has a 32s cooldown and makes no particles, and her Burst costs 80 Energy
  • Wet on the active character can backfire against Cryo or Electro enemies
  • Outclassed by Kokomi and modern healers

Notable dupes · Constellation

C1
Optional

1 Energy every 10s: a small help for her Burst.

C2
Solid upgrade

−15% Skill cooldown and +15% Hydro DMG for the active character while the loop is up.

C6
Big upgrade

Revives a fallen teammate at full HP while she is off-field, once every 15 minutes: a lifesaver in long endgame fights.

Community

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Updated September 25, 2026 · Version 7.1
Sources & references
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