As an Ice-type Harmony support, Ruan Mei excels at damage boosting, Break effect, resistance penetration, and speed enhancement, making her an exceptionally powerful and highly versatile support character in the current version. Below, Enjoygm has prepared a super detailed build guide for you.

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Who is Ruan Mei?
Ruan Mei is an Ice-type character following the Path of Harmony. As a Harmony character, she provides the entire team with substantial damage boost, rare Resistance Penetration, speed increase for allies (excluding herself), as well as Break Effect and Break Efficiency for the whole party. This makes Ruan Mei highly versatile in team compositions, particularly in dual-DPS setups, where she offers exceptional value.

- Pros
High team-wide damage amplification
Unique Resistance Penetration utility
Versatile support for various team compositions
Significant synergy with Break-focused and dual-DPS teams
- Cons
Limited self-speed buff (affects only allies)
May face competition in teams already saturated with Harmony characters
Break Effect reliance might reduce flexibility in some scenarios
Skill Priority

Ultimate = Skill > Talent > Basic Attack
Ruan Mei, as the first limited 5-star Harmony character, possesses three skills that provide exceptionally powerful team-wide buffs. She offers beneficial effects across five different areas: Speed, Damage Boost, Penetration, Weakness Break Efficiency, and Break Effect.
Ruan Mei Materials

- Ascension Materials
Immortal Scionette x 15
Immortal Aeroblossom x15
Immortal Lumintwig x 15
Gelid Chitin x 65
- All Trace Node Materials
Harmonic Tune x 15
Immortal Scionette x 41
Ancestral Hymn x 72
Immortal Aeroblossom x 56
Stellaris Symphony x 139
Immortal Lumintwig x 58
Past Evils of the Borehole Planet Disaster x 12
Tracks of Destiny x 8
Best Light Cone for Ruan Mei
For optimal support performance, these are the top Light Cone choices for Ruan Mei.

| Light Cone | Stats(Lv80) | Wht It Fits |
| Past Self in Mirror 5★ (Signature) | HP: 1058ATK: 529DEF: 529 | Permanently increases Break Effect.Ultimate boosts all allies’ DMG and recovers Skill Points.Restores Energy to all allies. |
| Memories of the Past 4★ | HP: 953ATK: 423DEF: 397 | Increases the wearer’s Break Effect.Recovers Energy after using an attack. |
| Dance! Dance! Dance! 4★ | HP: 953ATK: 423DEF: 397 | Increases SPD for all allies.Advances all allies’ action forward after using Ultimate. |
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Best Relics and Planar Ornaments for Ruan Mei

- 4-Piece Sets
- Messenger Traversing Hackerspace: Prioritize this set if Break Effect reaches 160%.
- Planar Ornaments
Sprightly Vonwacq (Recommended): 2-Piece effect provides Energy Regeneration Rate. With SPD ≥ 120, enables 3-turn Ultimate rotation.
- Other Transitional Options
2+2+2 mixed sets using combinations of:
Messenger Traversing Hackerspace
Thief of Shooting Meteor
Talia: Kingdom of Banditry
Key Stat Priority: Ensure SPD ≥ 120 to maximize Ultimate uptime and team synergy.
Main Stats and Sub Stats Priority
| Body | HP / DEF |
| Feet | SPD |
| Sphere | HP / DEF |
| Rope | Break / Energy Regeneration |
| Sub-Stats Priority | Break effect > SPD > DEF |
Best Teams for Ruan Mei

| DOT Team | Ruan Mei + Kafka + Black Swan + HuoHuo | Ruan Mei provides team-wide buffs, all of which synergize perfectly with Damage-over-Time (DoT) team compositions. |
| The Herta Hypercarry Team | The Herta + Ruan Mei + Jade + Lingsha | This composition focuses on The Herta as the core hypercarry. Ruan Mei’s role is primarily to provide energy and assist in stack generation, and should be built with high Speed. |
| Jingliu Team | Jingliu + Ruan Mei + Bronya + Huohuo | Ruan Mei boosts team damage, reduces enemy resistances, and improves Break efficiency. Jingliu acts as the main Ice DPS with powerful AoE attacks. Bronya provides single-target cleanse, action advance, and damage buffs. Huohuo supplies Energy, healing, and attack boosts. |
Recommended Eidolons

- E1 | ★★★★★ (Excellent)
Provides a universal 20% DEF reduction for the team. This is a crucial upgrade.
- E4 | ★★★★☆ (Good)
Enhances Ruan Mei’s personal damage. Offers minimal direct improvement to overall team damage output.
- E6 | ★★★★★ (Excellent)
Extends the duration of her Ultimate’s field and significantly boosts her personal damage. This is a transformative Eidolon, especially for Break-focused team compositions.
Note: The E2 effect is not utilized by characters like Firefly.
Conclusion
For a support-oriented Ruan Mei, her first Eidolon (E1) holds the highest value. Prioritize her Eidolons before considering her signature Light Cone. The E1+S1 combination offers the best cost-effectiveness.
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