GachaBuilds
Firefly
Honkai: Star Rail

Firefly build

Equipment options · Main stats · Team examples

Your build plan

For Firefly, compare Whereabouts Should Dreams Rest while keeping the recommended ATK% · Speed · ATK% setup fixed. A weapon or set change is easier to judge when you do not also change the team and skill timing.

Equipment options

8 options

Start with equipment you can actually obtain. These are alternative recommendations, not pieces to equip together. Refinement, set size and team restrictions change the result.

BEST LIGHT CONES

Whereabouts Should Dreams Rest
Whereabouts Should Dreams Rest(S1)
Thus Burns the Dawn
Thus Burns the Dawn(S1)
On the Fall of an Aeon
On the Fall of an Aeon(S5)
Indelible Promise
Indelible Promise(S5)

BEST RELIC SETS

Iron Cavalry Against the Scourge
Iron Cavalry Against the Scourge(4-PC)
Thief of Shooting Meteor
Thief of Shooting Meteor(4-PC)

Planar ornaments

Forge of the Kalpagni Lantern
Forge of the Kalpagni Lantern(2-PC)
Talia: Kingdom of Banditry
Talia: Kingdom of Banditry(2-PC)

Main stats

Use the slot recommendations to make your first functional setup. When several stats are listed, choose the one that fills the gap in your current team rather than mixing every option.

BodyATK%
FeetSpeed
Planar SphereATK%
Link RopeBreak Effect
Substats

SPD (Until Breakpoint) > Break Effect% > ATK%

Skill priority

Follow the skill order below for your next upgrade. Compare one rank at a time, and keep the same team and enemy so equipment changes do not hide the result.

Skills priority: Ultimate > Skill = Talent > Basic
Major Traces priority: Module α: Antilag Outburst (A2) > Module β: Autoreactive Armor (A4) > Module γ: Core Overload (A6)

Abilities

Check ability names and unlock information against your current game form. Level, upgrades and variants can change skills.

Order: Flare Propulsion

Ability type / unlock: Single Target · Energy gain: 20 Break: 10

Skill parameters

Check the selected level and any upgrade requirements. Separate values can belong to different targets, triggers or phases; they do not necessarily apply together. These tables summarize numerical parameters, while some effects still require a complete gameplay explanation.

ParameterValueCondition markers
Scaling / ATK50%single target · target enemy · Fire DMG · DMG · ATK

Fyrefly Type-IV: Pyrogenic Decimation

Ability type / unlock: Single Target · Energy gain: 0 Break: 15

Skill parameters

Check the selected level and any upgrade requirements. Separate values can belong to different targets, triggers or phases; they do not necessarily apply together. These tables summarize numerical parameters, while some effects still require a complete gameplay explanation.

ParameterValueCondition markers
Scaling / HP20%HP
Scaling / ATK100%Fire DMG · DMG · ATK

Order: Aerial Bombardment

Ability type / unlock: Single Target · Energy gain: 0 Break: 20

Skill parameters

Check the selected level and any upgrade requirements. Separate values can belong to different targets, triggers or phases; they do not necessarily apply together. These tables summarize numerical parameters, while some effects still require a complete gameplay explanation.

ParameterValueCondition markers
Scaling / HP40%HP · Energy
Energy50%HP · Energy
Scaling / ATK100%Fire DMG · DMG · ATK
HP1when · if · HP

Fyrefly Type-IV: Deathstar Overload

Ability type / unlock: Blast · Energy gain: 0 Break: 30 + 15 adjacent

Skill parameters

Check the selected level and any upgrade requirements. Separate values can belong to different targets, triggers or phases; they do not necessarily apply together. These tables summarize numerical parameters, while some effects still require a complete gameplay explanation.

ParameterValueCondition markers
Scaling / HP25%HP
turns2adjacent
Scaling / ATK0.2Fire DMG · DMG · ATK
Break Effect100%Fire DMG · DMG · ATK
Scaling / ATK0.1adjacent · Fire DMG · DMG · ATK
Break Effect50%adjacent · Fire DMG · DMG · ATK
Parameter360%Break Effect

Fyrefly Type-IV: Complete Combustion

Ability type / unlock: Enhance | 240 energy cost · Energy gain: 5 Break: -

Skill parameters

Check the selected level and any upgrade requirements. Separate values can belong to different targets, triggers or phases; they do not necessarily apply together. These tables summarize numerical parameters, while some effects still require a complete gameplay explanation.

ParameterValueCondition markers
Parameter100%ATK
Parameter30when · while · ATK
Parameter50%DMG · ATK · Break DMG
Parameter10%DMG · Break DMG

Chrysalid Pyronexus

Ability type / unlock: Defense · Energy gain: 0 Break: -

Skill parameters

Check the selected level and any upgrade requirements. Separate values can belong to different targets, triggers or phases; they do not necessarily apply together. These tables summarize numerical parameters, while some effects still require a complete gameplay explanation.

ParameterValueCondition markers
HP20%when · each · maximum · up to · DMG · DMG Reduction · HP
Parameter20%when · each · maximum · up to · DMG · DMG Reduction · HP
Parameter10%maximum · DMG · DMG Reduction · Effect RES
Parameter50%when · if · Energy
Energy50%when · if · Energy

Δ Order: Meteoric Incineration

Ability type / unlock: Support · Energy gain: 0 Break: 20

Skill parameters

Check the selected level and any upgrade requirements. Separate values can belong to different targets, triggers or phases; they do not necessarily apply together. These tables summarize numerical parameters, while some effects still require a complete gameplay explanation.

Displayed version

ParameterValueCondition markers
seconds5
turn2all enemies · each · at the start
Scaling / ATK200%all enemies · Fire DMG · DMG · ATK

Module α: Antilag Outburst

Skill parameters

Check the selected level and any upgrade requirements. Separate values can belong to different targets, triggers or phases; they do not necessarily apply together. These tables summarize numerical parameters, while some effects still require a complete gameplay explanation.

Displayed version

ParameterValueCondition markers
Parameter25%while · Break Effect
time3each · maximum

Module β: Autoreactive Armor

Skill parameters

Check the selected level and any upgrade requirements. Separate values can belong to different targets, triggers or phases; they do not necessarily apply together. These tables summarize numerical parameters, while some effects still require a complete gameplay explanation.

Displayed version

ParameterValueCondition markers
Parameter150%when · Break Effect
Parameter300%when · Break Effect
Parameter1per · DMG · Break DMG
Break DMG100%per · DMG · Break DMG
Break DMG150%per · DMG · Break DMG

Module γ: Core Overload

Skill parameters

Check the selected level and any upgrade requirements. Separate values can belong to different targets, triggers or phases; they do not necessarily apply together. These tables summarize numerical parameters, while some effects still require a complete gameplay explanation.

Displayed version

ParameterValueCondition markers
point10ATK · Break Effect
Parameter1800ATK · Break Effect
Break Effect0.8%ATK · Break Effect

In Reddened Chrysalis, I Once Rest

Ability type / unlock: Eidolon 1

Skill parameters

Check the selected level and any upgrade requirements. Separate values can belong to different targets, triggers or phases; they do not necessarily apply together. These tables summarize numerical parameters, while some effects still require a complete gameplay explanation.

Displayed version

ParameterValueCondition markers
Scaling / DEF15%when · DEF

From Shattered Sky, I Free Fall

Ability type / unlock: Eidolon 2

Skill parameters

Check the selected level and any upgrade requirements. Separate values can belong to different targets, triggers or phases; they do not necessarily apply together. These tables summarize numerical parameters, while some effects still require a complete gameplay explanation.

Displayed version

ParameterValueCondition markers
time1per · at the start

Amidst Silenced Stars, I Deep Sleep

Ability type / unlock: Eidolon 3

Skill parameters

Check the selected level and any upgrade requirements. Separate values can belong to different targets, triggers or phases; they do not necessarily apply together. These tables summarize numerical parameters, while some effects still require a complete gameplay explanation.

Displayed version

ParameterValueCondition markers
Parameter+2maximum · up to
Parameter+1maximum · up to

Upon Lighted Fyrefly, I Soon Gaze

Ability type / unlock: Eidolon 4

Skill parameters

Check the selected level and any upgrade requirements. Separate values can belong to different targets, triggers or phases; they do not necessarily apply together. These tables summarize numerical parameters, while some effects still require a complete gameplay explanation.

Displayed version

ParameterValueCondition markers
Effect RES50%while · Effect RES

From Undreamt Night, I Thence Shine

Ability type / unlock: Eidolon 5

Skill parameters

Check the selected level and any upgrade requirements. Separate values can belong to different targets, triggers or phases; they do not necessarily apply together. These tables summarize numerical parameters, while some effects still require a complete gameplay explanation.

Displayed version

ParameterValueCondition markers
Parameter+2maximum · up to

In Finalized Morrow, I Full Bloom

Ability type / unlock: Eidolon 6

Skill parameters

Check the selected level and any upgrade requirements. Separate values can belong to different targets, triggers or phases; they do not necessarily apply together. These tables summarize numerical parameters, while some effects still require a complete gameplay explanation.

Displayed version

ParameterValueCondition markers
RES PEN20%while · RES PEN
Parameter50%when · ATK

Displayed stats

Level 80

HP 814
ATK 523
DEF 776
Speed 104

Team examples

A lineup is a starting point: check that each teammate is available and that your team can repeat its resource cycle. Replacing a unit also changes buff timing and defensive coverage.

GACHABUILDS

Test your setup

Choose one option, run the same encounter twice, and change one variable. Record whether the next rotation starts on time and whether the team survives without losing its damage window.

Checked · 2026-10-13 · Patch 4.2

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