Hyacine — Honkai Star Rail Character Guide

Overview

HP-scaling healer whose memosprite Little Ica deals damage based on accumulated healing tally and passively heals allies after HP loss. Provides teamwide Max HP buffs and debuff cleansing. Strongest in teams with HP-scaling DPS; requires 200+ SPD in combat to activate her A6 trace.

HP-scaling Remembrance healer who summons memosprite Little Ica to provide passive healing and deal AoE Wind DMG based on a cumulative healing tally. Ultimate enters After Rain state for 3 turns, granting 30% + 600 Max HP to all allies and enabling Little Ica to act after every Hyacine ability. Manages a 140-Energy Ultimate cycle with 30 Energy from first Little Ica summon and 15 Energy on subsequent summons. Requires 200+ SPD in combat to activate A6 trace for additional Max HP and Outgoing Healing scaling.

Key Mechanics

• Little Ica's Memosprite Skill deals AoE Wind DMG equal to 20% of the cumulative healing tally (all healing done by Hyacine and Little Ica in the battle). Each use clears 50% of the tally, so damage is always increasing but each burst depletes half the stored value.
• Little Ica has 0 SPD and does not appear on the Action Order. During After Rain state, Little Ica gains an extra turn and automatically uses Memosprite Skill after every Hyacine ability. This means Little Ica attacks once per Hyacine action during After Rain.
• When any ally (except Little Ica) has HP reduced — from enemy attacks, self-consumption, or ally HP drain — Little Ica consumes 4% own Max HP and heals that ally for 2% of Hyacine's Max HP + 20. During After Rain, this healing extends to all allies instead of just the triggered target.
• Little Ica's passive also reduces all Continuous Effects' duration by 1 turn after using an ability. This includes debuffs on allies, making Hyacine teams more resistant to DoT effects.
• Energy management: Little Ica generates 30 Energy for Hyacine on first summon and 15 Energy on subsequent summons. When Little Ica falls, Hyacine's action is advanced by 30%. The 140 Energy cost is manageable with Skill generating 30 Energy per use plus Little Ica's summon energy.

Best DPS Pairings

Castorice (S), March 7th • Evernight (S), Blade (S), Jingliu (S), Serval (S), Kafka (A), Silver Wolf LV.999 (A), Sparxie (A), Anaxa (A), Herta (A), Jade (A), Mydei (A), Welt (A), Acheron (A)

Investment Priority

1. LC S1 — Signature provides 18% SPD (critical for reaching 200+ breakpoint), HP drain on every action enabling Blade and Castorice synergies, and 18% Vulnerability debuff from Little Ica. Unlocks entirely new team archetypes that E0 Hyacine cannot access — without it, she functions only as a healing sustain with no debuff application. Also extends value to other Remembrance carries (RMC, Cyrene).
2. E1 — Adds 50% Max HP during After Rain state — a massive damage multiplier for HP-scaling carries like Castorice, Evernight, Blade, and Mydei. Also restores 8% Max HP after every attack, feeding healing tally for Little Ica's damage and enabling aggressive HP-drain gameplay. Best stopping point for spenders after signature.
3. E2 — Grants 30% SPD for 2 turns after any ally HP loss. In HP-drain teams this is near-permanent, substantially increasing healing output and Little Ica's damage frequency.

Best Relics

Recommended: warrior-goddess-of-sun-and-thunder with giant-tree-of-rapt-brooding

Stat targets: SPD 200+, CRIT DMG 100%+, Effect RES 32%+

Main stats: Body: Healing Boost / HP% · Feet: SPD · Sphere: HP% · Rope: Energy Regen

Important Notes

• Requires 200+ SPD in combat to activate A6 trace — achievable with Memory's Curtain S5 or signature LC plus substat investment in SPD.
• SP-intensive rotation to maintain After Rain state uptime. Best paired with SP-positive or SP-neutral teammates such as Tribbie or Remembrance Trailblazer.
• Signature LC unlocks Blade and Acheron team archetypes via HP drain; without it, Hyacine functions only as a healing sustain with no debuff application.
• E1 is the primary investment target for spenders — 50% additional Max HP during After Rain is transformative for HP-scaling carries and the most impactful eidolon per cost.