Ice
Harmony
Ruan Mei
Genius Society Life Sciences Expert
TierS
RolesSupport · Amplifier · Break
Release1.6
Ruan Mei is an Ice Harmony support built on Break Effect. Her Skill boosts the whole team's DMG and Weakness Break Efficiency, her Ultimate grants All-Type RES PEN and delays enemies again when they try to recover from Weakness Break, and her Talent speeds up every teammate. She is a core member of Super Break teams, and her universal buffs still fit many other archetypes.
Break support
Light Cones
Past Self in Mirror BiS
5★
Signature and best in slot: 60% Break Effect, team Energy each wave and a Skill Point per Ultimate. Its DMG bonus matters less in Break teams.
Break Effect +60%; the Ultimate gives all allies +24% DMG for 3 turns (and 1 Skill Point at 150% Break Effect), and allies regenerate 10 Energy each wave.
In Pursuit of the Wind
4★
Top 4★ for Break teams (S5): an unconditional team-wide Break DMG boost that also applies to Super Break.
All allies' Break DMG +16% after entering battle.
Memories of the Past
4★
At S5, enables a reliable 3-turn Ultimate rotation and gives Break Effect to reach 180%.
Break Effect +28%, and attacking regenerates 4 extra Energy once per turn.
Dance! Dance! Dance!
4★
Specialist option: team-wide action advance on each Ultimate, for players who build around SPD breakpoints.
Using the Ultimate advances all allies' actions by 16%.
But the Battle Isn't Over
5★
Standard 5★: Energy Regeneration and a DMG boost for the next ally to act.
Energy Regeneration Rate +10%; the Ultimate on an ally recovers 1 Skill Point every 2 uses, and the Skill gives the next ally to act +30% DMG.
Meshing Cogs
3★ Energy option (S5): solves Energy issues, especially when she gets hit often, at the cost of all other effects.
Regenerates 4 extra Energy after attacking or being hit, once per turn.
Relics
Watchmaker, Master of Dream Machinations
×4
Best set for Break teams: Break Effect, then +30% Break Effect for all allies for 2 turns after her Ultimate.
Set effects
2pIncreases Break Effect by 16%.
4pWhen the wearer uses their Ultimate on an ally, all allies' Break Effect increases by 30% for 2 turn(s). This effect cannot be stacked.
Messenger Traversing Hackerspace
×4
SPD and a team-wide SPD buff after her Ultimate; time it carefully.
Set effects
2pIncreases SPD by 6%.
4pWhen the wearer uses their Ultimate on an ally, SPD for all allies increases by 12% for 1 turn(s). This effect cannot be stacked.
Thief of Shooting Meteor
×4
Lots of Break Effect, plus Energy whenever she breaks an enemy.
Set effects
2pIncreases Break Effect by 16%.
4pIncreases the wearer's Break Effect by 16%. After the wearer inflicts Weakness Break on an enemy, regenerates 3 Energy.
Thief of Shooting Meteor
×2
Watchmaker, Master of Dream Machinations
×2
Flexible 2+2 Break Effect mix.
Set effects
2pIncreases Break Effect by 16%.
2pIncreases Break Effect by 16%.
Planar ornaments
Sprightly Vonwacq
×2
Best option: Energy Regeneration and a 40% action advance at the start of battle (120+ SPD) to buff the team first.
Set effects
2pIncreases the wearer's Energy Regeneration Rate by 5%. When the wearer's SPD reaches 120 or higher, the wearer's action is Advanced Forward by 40% immediately upon entering battle.
Broken Keel
×2
Team CRIT DMG with at least 30% Effect RES, for CRIT-based teams.
Set effects
2pIncreases the wearer's Effect RES by 10%. When the wearer's Effect RES is at 30% or higher, all allies' CRIT DMG increases by 10%.
Fleet of the Ageless
×2
Team ATK at 120+ SPD, for ATK-scaling teams.
Set effects
2pIncreases the wearer's Max HP by 12%. When the wearer's SPD reaches 120 or higher, all allies' ATK increases by 8%.
Talia: Kingdom of Banditry
×2
Only if you need its Break Effect (at 145 SPD) to reach 180%.
Set effects
2pIncreases the wearer's Break Effect by 16%. When the wearer's SPD reaches 145 or higher, the wearer's Break Effect increases by an extra 20%.
Main stats
Body
HP%
/ DEF%
Feet
SPD
Planar Sphere
HP%
/ DEF%
Link Rope
Energy Regeneration Rate
/ Break Effect
Substat priority
1Break Effect
2SPD
3HP%
4DEF%
5Effect RES
Stat targets
- Break Effect: 180% with her A2 (maxes her A6)
- SPD: 134 (recommended); 109 and 121 are lower breakpoints
- Energy Regeneration Rate: 119.44% (Energy Regeneration Rope)
- HP: 3,700–5,000+ · DEF: 1,000–1,100+
- Effect RES: 30% with Broken Keel
Talent priority
Skill
Ultimate
Talent
Basic ATK
Major Trace priority: Candle Lights on Still Waters (A6) > Inert Respiration (A2) > Days Wane, Thoughts Wax (A4).
Teams
Recommended teams
Firefly Super Break
Her most used team: Break Efficiency, SPD and extended Weakness Break for Firefly, with Fugue and The Dahlia adding Super Break damage.
Firefly with the Trailblazer
The free Harmony Trailblazer replaces Fugue as the Super Break enabler.
Accessible teammates
Super Break team where Ruan Mei is the only limited character: March 7th (The Hunt) as the carry, the free Harmony Trailblazer and Gallagher.
Guide
How to play
How she works
- Skill: String Sings Slow Swirls. Grants her Overtone: for 3 turns (counted down at the start of her turns), all allies deal 32% more DMG and gain 50% Weakness Break Efficiency. Her A6 adds 6% DMG for every 10% Break Effect above 120%, up to +36% at 180%.
- Ultimate: Petals to Stream, Repose in Dream (130 Energy). A Zone for 2 turns: all allies gain 25% All-Type RES PEN, and their attacks apply Thanatoplum Rebloom. When a broken enemy tries to recover, it stays broken, is delayed by 20% of her Break Effect + 10%, and takes Break DMG.
- Talent: Somatotypical Helix. +10% SPD for all teammates, and she deals extra Ice Break DMG whenever an ally breaks an enemy.
- Traces. Inert Respiration (A2): +20% Break Effect for all allies. Days Wane, Thoughts Wax (A4): 5 Energy at the start of each of her turns.
Rotation
- Her Technique triggers her Skill for free at the start of battle.
- Use her Ultimate as soon as it's ready, then her Skill every time Overtone is about to expire.
- Fill the other turns with Basic ATKs to generate Skill Points.
Tips
- 180% Break Effect (her A2 included) maxes out her A6; after that, aim for 134 SPD.
- An Energy Regeneration Rope plus her A4 makes her Ultimate much more frequent than a Break Effect Rope.
- Sprightly Vonwacq lets her act first to apply her buffs before your damage dealers move.
Strengths
- Team-wide DMG, Weakness Break Efficiency and a rare All-Type RES PEN buff
- Permanent SPD buff for every teammate
- Core member of Super Break teams, and still great in other archetypes
- Strong defensive value by keeping enemies broken and delayed
Weaknesses
- Very demanding to build: high Break Effect, SPD and Energy all at once
- Her Break DMG can steal kills from damage dealers who rely on last hits
- No longer the first pick outside Break teams
Notable dupes · Eidolon
E1
Big upgrade
All allies ignore 20% DEF while her Zone is active.
E2
Solid upgrade
Allies gain 40% ATK against Weakness Broken enemies.
E4
Solid upgrade
+100% Break Effect for 3 turns when an enemy is broken, boosting her own Break DMG.
E6
Solid upgrade
Her Zone lasts 1 more turn and her Talent's Break DMG multiplier rises by 200%.
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Updated September 25, 2026 · Version 4.5