Gallagher Guide and Best Builds

Introductions

Gallagher is a 4-Star character with the Fire element who follows the Path of Abundance. Gallagher is a sustain-focused character who applies debuffs, increases Break DMG, is SP-positive and works extremely well in Break-focused teams. While he can slot into a wide range of team compositions, Gallagher shines brightest in Break-focused teams, where his utility and healing make him one of the strongest sustain options available.
Our Gallagher Build Guide will show you the best Light Cones, Relics and Team Compositions to help you build the best Gallagher.

Gallagher's Best Light Cone

Listed below are our recommendations for Light Cones to use on Gallagher.

Scent Alone Stays True
S1

Increases the wearer's Break Effect by 60.0 / 70.0 / 80.0 / 90.0 / 100%. After the wearer uses Ultimate to attack enemy targets, inflicts the targets with the "Woefree" state, lasting for 2 turn(s). While in "Woefree," enemy targets take 10.0 / 12.0 / 14.0 / 16.0 / 18.0% increased DMG. The effect of increasing DMG taken is additionally boosted by 8.0 / 10.0 / 12.0 / 14.0 / 16.0% if the wearer's current Break Effect is 150.0% or higher.

Sources: Event Warp (limited)

Scent Alone Stays True is an excellent 5-star Light Cone for Gallagher. The substantial Break Effect bonus works very well with Gallagher's kit, increasing his Outgoing Healing through his traces, boosts his Break and Super Break damage and helps him deal significant damage when triggering Break effects, particularly through his enhanced Basic Attack.

Night of Fright
S1

Increases the wearer's Energy Regeneration Rate by 12.0 / 14.0 / 16.0 / 18.0 / 20.0%. When any ally uses their Ultimate, the wearer restores HP for the ally currently with the lowest HP percentage by an amount equal to 10.0 / 11.0 / 12.0 / 13.0 / 14.0% of the healed ally's Max HP. When the wearer provides healing for an ally, increases the healed ally's ATK by 2.4 / 2.8 / 3.2 / 3.6 / 4.0%. This effect can stack up to 5 times and lasts for 2 turn(s).

Sources: Event Warp (limited)

Night of Fright is another solid option for Gallagher. He benefits from the increased Energy Regeneration Rate, while the extra healing and ATK buff provide additional team support.

Multiplication
S5

After the wearer uses their Basic ATK, their next action will be Advanced Forward by 12.0 / 14.0 / 16.0 / 18.0 / 20.0%.

Sources: Stellar Warp

Multiplication provides Gallagher with action advance enabling him to provide faster healing, generate Skill Points and recharge his ultimate faster making him a more reliable sustain.

Quid Pro Quo
S5

At the start of the wearer's turn, regenerates 8 / 10 / 12 / 14 / 16 Energy for a randomly chosen ally (excluding the wearer) whose current Energy is lower than 50.0%.

Sources: Forgotten Hall Store, Echo of War

Quid Pro Quo regenerates up to 16 energy for a random ally with low energy, this makes it a strong support option for Gallagher, as it helps allies improve their Ultimate uptime which is highly beneficial in teams that rely heavily on frequent Ultimate usage.

Post-Op Conversation
S5

Increases the wearer's Energy Regeneration Rate by 8.0 / 10.0 / 12.0 / 14.0 / 16.0% and increases Outgoing Healing when they use their Ultimate by 12.0 / 15.0 / 18.0 / 21.0 / 24.0%.

Sources: Stellar Warp

Post-Op Conversation is a 4-star Light Cone that increases Gallagher's ERR. This allows him to apply Besotted more often, improving his team-wide healing when allies attack affected enemies.

Dream's Montage
S5

Increases the wearer's SPD by 8.0 / 9.0 / 10.0 / 11.0 / 12.0%. After attacking enemy targets that are Weakness Broken, regenerates 3 / 3.5 / 4 / 4.5 / 5 Energy. This effect can trigger up to 2 time(s) per turn.

Sources: Event Warp (limited)

Dream's Montage helps improve Gallagher’s turn frequency, while restoring Energy when he attacks Weakness Broken enemies. Since Gallagher often plays in Break-focused teams frequently attacking broken enemies, he can trigger this effect fairly consistently.

What Is Real?
S5

Increases the wearer's Break Effect by 24.0 / 30.0 / 36.0 / 42.0 / 48.0%. After using Basic ATK, restores HP for the wearer by an amount equal to 2.0 / 2.5 / 3.0 / 3.5 / 4.0% of Max HP plus 800.

Sources: Forgotten Hall Store

What Is Real enables Gallagher to break enemy weakness faster. The extra healing from using his Basic ATK helps him stay alive without relying entirely on support, which can be useful when there are no other sustain units.

Unto Tomorrow's Morrow
S5

Increases the wearer's Outgoing Healing by 12.0 / 15.0 / 18.0 / 21.0 / 24.0%. When an ally target's current HP percentage is greater than or equal to 50.0%, increases the DMG dealt by 12.0 / 14.0 / 16.0 / 18.0 / 20.0%.

Sources: Nameless Glory

Perfect Timing
S5

Increases the wearer's Effect RES by 16.0 / 20.0 / 24.0 / 28.0 / 32.0% and increases Outgoing Healing by an amount that is equal to 33.0 / 36.0 / 39.0 / 42.0 / 45.0% of Effect RES. Outgoing Healing can be increased this way by up to 15.0 / 18.0 / 21.0 / 24.0 / 27.0%.

Sources: Stellar Warp

Best Relics and Planar Ornaments for Gallagher

Best Relics for Gallagher

These are the best Relic Sets to build for Gallagher.

Warrior Goddess of Sun and Thunder

2-Piece Set: Increases SPD by 6.0%.

4-Piece Set: When the wearer or their memosprite provides healing to ally targets other than themselves, the wearer gains "Gentle Rain," which lasts for 2 turn(s) and can only trigger once per turn. While the wearer has "Gentle Rain," SPD increases by 6.0% and all allies' CRIT DMG increases by 15.0%. This effect cannot stack.

Warrior Goddess of Sun and Thunder is decent supportive option for Gallagher. Increasing his turn frequency from the additional SPD and granting all allies 15% increased CRIT DMG when he provides healing.

Thief of Shooting Meteor

2-Piece Set: Increases Break Effect by 16.0%.

4-Piece Set: Increases the wearer's Break Effect by 16.0%. After the wearer inflicts Weakness Break on an enemy, regenerates 3 Energy.

Thief of Shooting Meteor is primarily used in Break-focused teams. Gallagher benefits greatly from its Break Effect bonus, as parts of his kit such as his Outgoing Healing, scale with Break Effect. The additional Energy Regeneration is also valuable.

Sacerdos' Relived Ordeal

Messenger Traversing Hackerspace

2-Piece Set: Increases SPD by 6.0%.

4-Piece Set: When using Skill or Ultimate on one ally target, increases the ability target's CRIT DMG by 18.0%, lasting for 2 turn(s). This effect can stack up to 2 time(s).

2-Piece Set: Increases SPD by 6.0%.

4-Piece Set: When the wearer uses their Ultimate on an ally, SPD for all allies increases by 12.0% for 1 turn(s). This effect cannot be stacked.

Aside from the mentioned 4-piece sets, Gallagher also works well with a variety of 2-piece sets, whether that is SPD% with SPD% or SPD% with Break Effect%. Below are some options that can work well for him:

Messenger Traversing Hackerspace - SPD%
Warrior Goddess of Sun and Thunder - SPD%
Sacerdos' Relived Ordeal - SPD%
Diviner of Distant Reach - SPD%
Watchmaker, Master of Dream Machinations - BE%
Iron Cavalry Against the Scourge - BE%
Thief of Shooting Meteor - BE%
Passerby of Wandering Cloud - Outgoing Healing% (Another option)

Best Planar Ornaments

Forge of the Kalpagni Lantern

2-Piece Set: Increases the wearer's SPD by 6.0%. When the wearer hits an enemy target that has Fire Weakness, the wearer's Break Effect increases by 40.0%, lasting for 1 turn(s).

Forge of the Kalpagni Lantern helps Gallagher act more frequently by increasing his Speed while also boosting his Break Effect enabling more frequent weakness breaks.

Talia: Kingdom of Banditry

2-Piece Set: Increases the wearer's Break Effect by 16.0%. When the wearer's SPD reaches 145 or higher, the wearer's Break Effect increases by an extra 20.0%.

Talia: Kingdom of Banditry increases Gallagher's Break Effect while granting additional Break Effect upon meeting the SPD threshold. By provides a decent boost to his Break Effect, directly enhancing his kit improves his overall effectiveness as a sustain.

Broken Keel

2-Piece Set: Increases the wearer's Effect RES by 10.0%. When the wearer's Effect RES is at 30.0% or higher, all allies' CRIT DMG increases by 10.0%.

Broken Keel increases Gallagher's Effect RES and increases his allies CRIT DMG. This makes Broken Keel a strong option for Gallagher, helps him resist debuffs, while the team-wide CRIT DMG buff increases the damage output of allies. It is particularly effective in teams that rely heavily on critical hits for maximum damage.

Fleet of the Ageless

2-Piece Set: Increases the wearer's Max HP by 12.0%. When the wearer's SPD reaches 120 or higher, all allies' ATK increases by 8.0%.

Fleet of the Ageless increases Gallagher's Max HP abd provides all allies with an ATK buff. While Gallagher generally prefers Break Effect-focused sets, Fleet of the Ageless can be a good option for improving survivability through the HP increase, while also being a decent choice when he is part of ATK-scaling teams.

Penacony, Land of the Dreams

2-Piece Set: Increases wearer's Energy Regeneration Rate by 5.0%. Increases DMG by 10.0% for all other allies that are of the same Type as the wearer.

Penacony, Land of the Dreams increases Gallagher's Energy Regeneration Rate and increases the DMG dealt by all allies excluding himself who are of the same type as himself. The team-wide Fire DMG bonus makes this set a good option for Fire-focused teams.

Gallagher's Stat Priority

Body

Outgoing Healing Boost

Feet

SPD

Planar Sphere

DEF

Link Rope

Energy Regeneration Rate

Stat Priority

SPD

Break Effect

DEF

Effect Resistance

Recommended Endgame Stats for Gallagher

4500+

DEF

1000+

SPD

134+

Break Effect

60%

Traces Priority

Skills Priority

Talent > Skill > Basic > Ultimate

Major Traces Priority

Novel Concoction > Bottoms Up > Organic Yeast

Gallagher Build Comments

Character Overview Kit Overview

Character Overview

Gallagher is a flexible sustain and support character who combines strong team healing with valuable enemy debuffs. Unlike many healers, his healing relies primarily on high base values rather than stat scaling, allowing for a wide range of build options. Beyond keeping the team alive, Gallagher contributes significantly through debuff application, Toughness damage and Break-focused support. This makes him especially effective in Super Break teams and HP-scaling compositions, while his debuffs also synergise well with characters that benefit from attacking weakened enemies. As one of the strongest 4-star sustain units available, Gallagher offers an excellent balance of survivability, utility and offensive support, making him a valuable addition to a wide variety of team compositions.

Kit Overview

While Gallagher's Skill provides direct healing for emergencies, the majority of his sustain comes from his Talent, which allows allies to recover HP whenever they attack enemies affected by "Besotted". This enables Gallagher to keep his team healthy while spending fewer Skill Points than many traditional healers, allowing other allies to take advantage of this.

Gallagher's Ultimate plays a central role in his kit by applying Besotted to all enemies, increasing the Break DMG they receive and enabling his team-wide healing effect. It also enhances his next Basic ATK, turning it into "Nectar Blitz", a stronger attack that deals increased Fire DMG while reducing the target's ATK. This combination allows Gallagher to contribute meaningful offensive pressure while also improving team survivability.

Thanks to his frequent debuff application, Toughness damage and Break-focused support, Gallagher excels in teams that focus on Weakness Breaks. His ability to provide healing through offensive actions also makes him particularly effective in aggressive teams that prefer to maintain momentum rather than dedicate turns to recovery.

Gallagher's Best Teams

To learn all about Gallagher's synergies and best team compositions, check out our dedicated Gallagher team page below:

Gallagher Teams

Gallagher's Best Eidolons

E2 – When Gallagher uses his Skill, it dispels 1 debuff from a targeted ally. At the same time, it also increases that ally's Effect RES by 30% for a couple of turns.
E4 – Gallagher's E4 increases the duration of the "Besotted" state, which is inflicted by his Ultimate, by 1 turn.
E6 – E6 increases Gallagher's Break Effect by 20% as well as his Weakness Break Efficiency by 20%.
E1 – As Gallagher enters battle, he regenerates 20 Energy and increases his Effect RES by 50%.

Holster

Guide Author

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Holster is a passionate gacha gamer who spends her time exploring the worlds of Genshin Impact and Honkai: Star Rail. Whether she's pulling for her favorite characters, building new team comps or exploring what the game has to offer.