Cyrene — Honkai Star Rail Character Guide

Overview

Capstone support for Chrysos Heirs providing unique curated buffs, True DMG amplification, and teamwide Ultimate activation. Extremely slow ramp-up at E0 outside mono-Remembrance, but elevates invested Chrysos teams to new heights.

HP-scaling Remembrance support who collects Recollection points from ally actions to charge a unique Ultimate system. First Ultimate (24 Recollection) summons memosprite Demiurge, activates all teammates' Ultimates, permanently deploys a True DMG Zone, and unlocks curated Ode buffs for each Chrysos Heir. Subsequent Ultimates cost 12 Recollection and grant Demiurge extra turns to apply additional Ode buffs or deal AoE Ice DMG. Extremely slow ramp-up at E0 outside mono-Remembrance teams.

Key Mechanics

• Demiurge has 0 SPD, does not appear on Action Order, and is considered Out-of-Bounds (cannot be targeted). HP percentage mirrors Cyrene's. While on field, both gain 24% Max HP. After using abilities, all Continuous Effects on Demiurge decrease by 1 turn. On summon, dispels all Crowd Control debuffs from all allies.
• Ode buffs are curated per Chrysos Heir — each receives a unique effect (permanent or one-time). Non-Chrysos Heirs receive a generic 40% DMG buff for 2 turns. Strongest Odes: Mydei (free Godslayer Be God with 200% CRIT DMG), Aglaea (72% DMG + 36% DEF Ignore + 70 Energy), Anaxa (+3 Skill instances + immediate action + 60% Erudition ATK + 40% Skill DMG).
• Recollection generation is fastest in mono-Remembrance teams: each ally action grants 1 Recollection via Future, and each memosprite action also generates 1 via A2. In a team with 3 Remembrance allies, start with 6 Recollection from A4. Without Remembrance allies, ramp-up is extremely slow.
• First Ultimate activates all teammates' Ultimates — this includes special energy systems (Phainon Coreflames, Castorice Newbud, Acheron Slashed Dream, Feixiao Flying Aureus). This single effect can accelerate entire team rotations by a full cycle.
• SPD 180 is the minimum threshold for A6 teamwide 20% DMG buff. SPD 200 enables 3 turns within 150 AV with Vonwacq, maximizing Recollection generation speed. The Ice RES PEN from A6 is primarily relevant at E1+ where personal damage becomes meaningful.

Best DPS Pairings

Castorice (S), Kafka (S), March 7th • Evernight (S), Anaxa (S), Black Swan (A), Hysilens (A), Mydei (A), Aglaea (A)

Investment Priority

1. E2 — Grants 12 additional Recollection at combat start, fixing the fundamental ramp-up problem. Recommended first target for non-mono-Remembrance teams.
2. LC S1 — Provides critical SPD to reach 180+ breakpoint. Get after E2 solves ramp-up so SPD gains translate into more Ultimates.
3. E1 — Only worthwhile on the way to E2. Adds extra Ultimate charges after first Ult but does not help reach that first Ult.

Best Relics

Recommended: sacerdos-relived-ordeal + messenger-traversing-hackerspace with sprightly-vonwacq

Stat targets: SPD 180-200, CRIT Rate ~50%, HP% 5000+

Main stats: Body: HP% / CRIT DMG · Feet: SPD · Sphere: HP% / Ice DMG · Rope: HP%

Important Notes

• E0 ramp-up is extremely slow outside mono-Remembrance — first Ultimate often arrives too late in fast-paced modes (PF, AS, Arbitration)
• E2 is near-mandatory for non-Remembrance teams — without it, the team may spend an entire cycle at reduced effectiveness
• Requires pre-existing Chrysos Heir investment to justify; she is a capstone support, not a standalone value pickup
• Value is explicitly tied to Chrysos Heirs — longevity uncertain as Amphoreus saga concludes and Trailblazer moves to a new Path
• Unique Odes vary wildly in power — Mydei Ode is outstanding, Tribbie and Cipher Odes are modest
• Several Chrysos Heirs require other specific supports more than Cyrene (Castorice wants Hyacine, Phainon wants Cerydra, Aglaea wants Sunday)