Gallagher 
Abundance A security officer of the Bloodhound Family at Penacony. He is always courteous toward visiting guests but keeps his vigilance about him. He seems to carry a weight of a complicated past, yet he never voluntarily divulges any details.
HP
ATK
DEF
SPEEDBreak Effect Healer Build
Best Light Cone
Gallagher Best Stats
Gallagher Best Substats
Gallagher Best Relics
Gallagher Best Ornaments
Forge of the Kalpagni Lantern
Talia: Kingdom of Banditry
Giant Tree of Rapt Brooding
Gallagher Best Teams
Gallagher + March 7th (Imaginary) + Trailblazer (Imaginary) + Asta
Free-to-play Break-focused team. Gallagher acts as the healer and applies Besotted so allies can heal when attacking affected enemies. March 7th is the main Break DPS; the Harmony Trailblazer and Asta boost Break Effect and SPD/ATK to increase Break and damage output.
Gallagher + Firefly + Fugue + Ruan Mei
Gallagher trades strong healing/debuff utility for a Break-focused support core. Fugue and Ruan Mei amplify Break Effect for the party, letting your DPS (e.g., Firefly) deal heavy damage to Weakness Broken enemies.
Gallagher + Acheron + Jiaoqiu + Pela
Sustain and debuff-focused team for DPS who scale off debuffed enemies. Gallagher's Besotted and healing assist Acheron's Slashed Dream stacking and generally improve uptime for follow-up reliant DPS.
Gallagher + Castorice + Trailblazer (Ice) + Tribbie
Sustain-oriented comp where Gallagher's healing supports DPS that need constant healing (Castorice notably benefits for Memosprite skill). Good for fights needing reliable sustain and debuff uptime.
Gallagher + Himeko + Topaz + Silver Wolf
Niche comp for fights where the enemy is Quantum-weak but missing Fire weakness. Silver Wolf can implant the required Fire Weakness so your Fire/Quantum DPS (or Himeko alternatives) can deal optimal damage.
Skills
Deals Fire DMG equal to #1[i]% of Gallagher's ATK to one designated enemy target.
Immediately heals a target ally for #1[i] HP.
Inflicts Besotted on all enemies, lasting for #2[i] turn(s). At the same time, deals Fire DMG equal to #1[i]% of Gallagher's ATK to all enemies, and enhances his next Basic ATK to Nectar Blitz.
The Besotted state makes targets receive #1[f1]% more Break DMG. Every time a Besotted target gets attacked by an ally, the attacking ally's HP is restored by #2[i].
Break DMG increases with higher Break Effect, higher target max Toughness, and higher character levels. Break DMG cannot CRIT Hit and is not affected by DMG Boost effects.
Traces
Eidolon
When entering the battle, Gallagher regenerates
When using the Skill, dispels
Debuffs are negative status effects that render units weaker. Unless otherwise specified, debuffs can be dispelled.
Skill Lv. +2, up to a maximum of Lv.
Extends the duration of the Besotted state inflicted by Gallagher's Ultimate by
Ultimate Lv. +2, up to a maximum of Lv.
Increases Gallagher's Break Effect by