RMC Cyrene Team Guide: Why They Match & Best Teams

Cyrene has revolutionized team-building in Honkai: Star Rail. As a Throne-level Emanator following the Path of Remembrance, her ability to activate team-wide Ultimates and provide specialized memosprite buffs creates unprecedented strategic possibilities.

In this guide, we will dissect the core mechanics that make RMC and Cyrene an unmatched duo. We'll then showcase the best teams to build around them, from hyper-carry powerhouses to relentless memosprite swarms, giving you the blueprint to dominate any challenge.

Why are RMC and Cyrene so well-matched?

Here’s a breakdown of why they are so perfectly matched:

The Perfect Energy Loop: This is the most fundamental and powerful synergy.

• Cyrene's Need: Cyrene's entire game plan revolves around generating "Recollection" to unleash her world-altering Ultimate. She gains it from her own actions, but a key source is her Talent: when allies with "Future" take action, they grant her 1 point.
• RMC's Contribution: RMC's memosprite, Mem, acts autonomously and frequently. Once summoned, Mem takes turns and uses its skill "Baddies! Trouble!" without consuming the Trailblazer's action.

The Synergy: Because Mem is an ally that can be granted "Future," every single one of its automatic attacks generates 1 "Recollection" for Cyrene. This creates a passive, high-speed energy engine that rapidly charges Cyrene's Ultimate without her needing to lift a finger. Mem effectively becomes a battery dedicated solely to powering up Cyrene.

Both characters possess unique ways to amplify team damage that stack multiplicatively.

• Cyrene's Zone: Her Skill creates a Zone that adds a burst of True DMG (scaling with her HP) to every instance of damage the team deals.
• RMC's Support: Its skill, "Lemme! Help You!", grants a single ally "Mem's Support," which also adds a burst of True DMG to every instance of damage that ally deals.

The Synergy: When you use RMC's support skill on your main DPS (e.g., Tribbie, Aglaea), that DPS now has two separate sources of True DMG triggering on every hit. For a character with multi-hit attacks, this results in a catastrophic damage explosion. Cyrene's Zone provides the team-wide damage floor, while Mem's Support provides the single-target damage ceiling.

In essence, RMC and Cyrene are so well-matched because:

• RMC is the perfect engine for Cyrene, providing the constant "Recollection" fuel she needs through Mem's autonomous attacks.
• Cyrene is the perfect amplifier for RMC's team, providing a team-wide True DMG field that makes Mem's own attacks and its support target hit exponentially harder.

Together, they control time itself, combining ultimate-speed activation with extra turns to create burst windows of unmatched density and power.

They don't just work well together; they fundamentally enable each other's peak performance, creating a synergistic loop that elevates any main DPS placed in the team with them.

Best Teams

Team I: RMC + Cyrene + Cerydra + Phainon

Cyrene

Trailblazer(The Remembrance)

Cerydra

Phainon

This team composition is a masterclass in creating a perfect engine for hyper-carry dominance. It focuses on turbo-charging Phainon's transformation into Khaslana at lightning speed and then leveraging Cerydra's "extra turn" mechanic to unleash a devastating, sustained barrage of attacks during his god-like state.

The Overdrive Transformation: A Custom "Coreflame" Engine for Phainon

A primary goal of this team is to maximize Phainon's "Coreflame" generation, aiming for a first or second-turn transformation.

• Cyrene's Mechanism: When Phainon are granted "Future," their actions generate "Recollection" for Cyrene. This also means Phainon's action frequency is directly linked to his own energy gain.
• RMC's Support: "Lemme! Help You!" provides 100% Action Advance. This can be used directly on Phainon, allowing him to act sooner, use his Skill to build "Coreflame" faster, or enter his transformation state earlier.
• Cerydra's "Military Merit" and Extra Turn (Coup de Main): This is the key breakthrough synergy. Cerydra's Talent, "Seize the Opportunity," allows her to perform a "Coup de Main" after an ally uses a Skill/Ultimate/Enhanced Basic Attack, mimicking the ability. When Cerydra mimics Phainon's Skill, "Let There Be Light," it is as if Phainon used his Skill twice in one cycle, granting him a massive 4 "Coreflame" instantly.

This dramatically reduces the number of turns Phainon needs to transform, and is the core mechanic for achieving an "opening turn" or "first-cycle" transformation.

Team II: RMC + Cyrene + Sunday + Dan Heng•Permansor Terrae

This team composition is a masterclass in focused amplification. It channels the continuous support power of the "Dual-Memosprite" engine and Sunday's buffs directly into Dan Heng • Permansor Terrae as a hyper-carry, creating a devastatingly powerful single-core burst team.

Cyrene

Trailblazer(The Remembrance)

Sunday

Dan Heng•Permansor Terrae

Core Synergies:

Cyrene's Ultimate: Provides team-wide Ultimate activation and a 50% CRIT Rate aura. This solves Dan Heng's Ultimate uptime and CRIT Rate requirements, allowing him to focus entirely on building CRIT DMG.

RMC's Support: Provides 100% Action Advance. This can be used at a critical moment to grant Dan Heng an immediate turn, allowing him to execute a second round of burst damage within his buff windows.

Sunday's Buffs: As a Harmony character, he is highly likely to provide the essential ATK and CRIT DMG multipliers that Dan Heng craves.

Synergy: The ideal combo is: RMC supports Dan Heng (Action Advance) -> Dan Heng uses Skill/Enhanced Basic -> Cyrene immediately uses her Ultimate (triggering full-team Ultimates, Dan Heng gains 50% CRIT Rate) -> Dan Heng instantly uses his own Ultimate followed by an Enhanced Basic. This sequence allows Dan Heng to unleash two massive waves of damage in an extremely short timeframe.

This team is the definitive choice for players who seek to obliterate their targets in a single, decisive strike, representing the highest potential achievable by a single-core team in the current environment.

Team III: RMC + Cyrene + Sunday + Hyacine

Cyrene

Trailblazer(The Remembrance)

Sunday

Hyacine

Core Synergies

This is the fundamental mechanic that allows the team to operate at a blinding pace. Cyrene's Ultimate charge rate becomes unprecedented. And the four characters collectively cover all key damage multipliers, and their effects stack multiplicatively.

• Cyrene: Provides DMG% Boost (20% from her Talent) and a separate True DMG instance.
• RMC: As established, every automatic attack from Mem grants Cyrene 1 point of "Recollection." Provides a team-wide CRIT DMG buff (from its Talent), stacking with Sunday's buffs, and a second source of True DMG (from "Mem's Support") for a designated target, stacking with Cyrene's Zone.
• Hyacine : Hyacine's memosprite, is also an autonomous, frequently acting entity. Under Cyrene's Talent, once Little Ica is granted "Future," every one of its actions will also grant Cyrene 1 "Recollection" point. Provides potent Healing and Damage Amplification (increasing ally damage based on her healing output). This acts as a further multiplier on the "Total Damage" category.
• Sunday: As a "Harmony" path character, he is highly likely to provide substantial ATK% and CRIT DMG buffs, covering the "Attack" and "Crit" multipliers.

Synergy: With both Mem and Little Ica on the field, Cyrene benefits from two independent, auto-attacking batteries. This passive generation of resources means Cyrene can charge her game-changing Ultimate with incredible speed, often without relying on the main characters' actions themselves.

This team has no clear weaknesses. It represents the pinnacle of synergy, perfectly blending sustained damage, explosive bursts, defensive resilience, and action control into a single, cohesive whole.

 

Conclusion

The synergy between RMC and Cyrene has established a new benchmark for team composition in Honkai: Star Rail. Cyrene and RMC together form the foundation upon which the next generation of elite teams will be built.