Gallagher — Honkai Star Rail Character Guide

Overview

Offensive healer applying Besotted debuff that heals allies when they attack afflicted enemies. Enhances Break DMG received and scales healing with Break Effect. Best 4-star sustain with exceptional Super Break and HP fluctuation synergy.

Offensive Abundance healer whose core mechanic is the Besotted debuff applied via Ultimate. Besotted enables passive healing — allies restore HP whenever they attack a Besotted enemy — and increases Break DMG taken. Gallagher cycles his 110-Energy Ultimate rapidly thanks to his A4 trace granting 100% Action Advance after Ultimate, then immediately follows up with Enhanced Basic ATK (Nectar Blitz) for massive single-target Toughness damage and an ATK reduction debuff.

Key Mechanics

• All healing is flat (no HP/ATK scaling) — Outgoing Healing from A2 trace (Break Effect conversion) is the only way to scale healing output. At 150% Break Effect with Outgoing Healing body piece, total healing is more than doubled.
• Besotted healing triggers per-hit per-enemy — multi-hit attacks (Feixiao, Topaz follow-ups) and AoE attacks against multiple Besotted enemies trigger multiple 640 HP restores, giving Gallagher exceptionally high healing throughput in multi-target scenarios.
• Nectar Blitz deals 90 Toughness damage (30 base) plus Ultimate's 60 AoE Toughness, totaling 150 single-target Toughness in one rotation — unheard of for a sustain unit. Combined with Fire element Break (highest immediate Break DMG), Gallagher contributes significant offensive utility.
• Besotted is tied to a 2-turn debuff on enemies (3 with E4). Fast-acting enemies can shed the debuff between Gallagher turns, completely stopping passive healing. SPD investment (134+ minimum, 143/160 recommended) is critical for maintaining uptime.
• Provides 2 debuffs rapidly (Besotted + ATK reduction from Nectar Blitz), making him synergistic with debuff-counting characters like Acheron and enabling Pioneer Diver of Dead Waters relic set for allies.

Best Gallagher DPS Pairings

Firefly (S), March 7th • The Hunt (S), Archer (A), Castorice (A), Kafka (A), March 7th • Evernight (A), Mydei (A), Himeko (A), Moze (A), Luka (A), Sushang (A), Xueyi (A)

Gallagher Investment Priority

1. E2 — Transforms Skill into cleanse bot with 30% Effect RES buff for 2 turns. Critical for debuff-heavy content (Imprisonment, Freeze, Entangle). Stacks with E1 for 80% total Effect RES, making CC nearly irrelevant.
2. LC S1 — Signature provides 60% Break Effect maxing A2 conversion at S1. Scent Alone's Vulnerability debuff amplifies all team damage. Gap to F2P options like What Is Real narrows significantly with Besotted.
3. E4 — Extends Besotted from 2 turns to 3 turns (50% uptime improvement). Dramatically reduces SPD requirements and enables consistent healing even at 134 SPD. Game-changing QoL for comfortable gameplay.
4. E1 — Regenerates 20 Energy at battle start and grants 50% Effect RES permanently. Strong entry bonus enabling faster first Ultimate uptime.

Gallagher Relics and Stat Targets

Recommended: Passerby of Wandering Cloud + Messenger Traversing Hackerspace with Forge of the Kalpagni Lantern

Stat targets: Break Effect 150%+, SPD 134-160

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

Best Gallagher Light Cones

• Scent Alone Stays True (Best in Slot): Best offensive option. Provides 60% Break Effect at S5 (maxes his A2 conversion at 150% total BE) and applies 18% Vulnerability debuff to enemies. The Vulnerability debuff is a separate multiplier that amplifies all team damage. Strong in both Break teams (BE stat) and CRIT teams (Vulnerability). S1 still provides 36% BE and 10% Vulnerability, making it excellent even without superimpositions.
• Quid Pro Quo: Best F2P utility option and most used LC (50% usage rate). When Gallagher is hit, restores 8 Energy to a random ally below 50% Energy. His A4 trace grants 100% Action Advance after Ultimate, enabling him to trigger this passive more frequently than other sustains. Excellent for energy-hungry DPS (Acheron, Blade) or enabling faster rotations. Superimposition only affects heal amount, not energy - S1 is perfectly viable.
• What Is Real?: Break-focused alternative. Provides 24% Break Effect at S5 and heals Gallagher for 2% Max HP when using Basic ATK. The self-heal helps sustain Gallagher himself in difficult content. Weaker than Scent for team damage but more accessible and still contributes meaningful Break Effect. Good budget option for Super Break teams.
• Post-Op Conversation: Energy-focused alternative. Increases Energy Regeneration Rate by 8% at S5 and grants 8% Outgoing Healing after Ultimate (only affects Gallagher's own healing, not the shared Talent heal). The ERR helps maintain Ultimate uptime, but Gallagher already has A4 advance making this less critical. Outweighed by Quid Pro Quo for energy support or What Is Real for Break teams.

Gallagher FAQ

Who works best with Gallagher in HSR?

Gallagher's best team options include Firefly, March 7th • The Hunt, Archer. StarGuide rates teammates by role and composition fit so the recommendation reflects how the character is actually played.

What relics should Gallagher use?

Gallagher's recommended relic setup is Passerby of Wandering Cloud + Messenger Traversing Hackerspace with Forge of the Kalpagni Lantern, with stat targets around Break Effect 150%+, SPD 134-160.

What is the best light cone for Gallagher?

Scent Alone Stays True is the top listed light cone for Gallagher. Best offensive option. Provides 60% Break Effect at S5 (maxes his A2 conversion at 150% total BE) and applies 18% Vulnerability debuff to enemies. The Vulnerability debuff is a separate multiplier that amplifies all team damage. Strong in both Break teams (BE stat) and CRIT teams (Vulnerability). S1 still provides 36% BE and 10% Vulnerability, making it excellent even without superimpositions.

How should I invest in Gallagher?

Gallagher's first listed investment priority is E2. Transforms Skill into cleanse bot with 30% Effect RES buff for 2 turns. Critical for debuff-heavy content (Imprisonment, Freeze, Entangle). Stacks with E1 for 80% total Effect RES, making CC nearly irrelevant.

Important Notes

• Besotted debuff has 2-turn base duration (3 with E4) - fast enemies can cleanse it quickly between Gallagher turns
• Requires 134+ SPD minimum to maintain reasonable Besotted uptime. 143/160 breakpoints recommended for competitive play
• Healing is entirely tied to Besotted debuff - if enemies cleanse frequently or Gallagher is CC'd, healing stops completely
• A6 AoE heal only triggers when enhanced Basic hits Besotted enemy - plan Ultimate timing to ensure Besotted is active
• Break Effect requirement (150% for max A2 conversion) can conflict with defensive stats - may be squishy without good substats
• Not the best sustain choice for pure hypercarry teams that don't leverage Break or debuffs - Aventurine/Huohuo typically better