Firefly Profile, Skills, Traces and Eidolons

Introductions

Firefly is a 5★ character with the Fire element who follows the Path of Destruction.
A member of the Stellaron Hunters, clad in a set of mechanized armor known as "SAM." Her character is marked by unwavering loyalty and steely resolve.
Engineered as a weapon against the Swarm, she experiences accelerated growth, but a tragically shortened lifespan.
She joined the Stellaron Hunters in a quest for a chance at "life," seeking to defy her fated demise.

Skills

Basic ATK

Order: Flare Propulsion

Single Target

Lv. 6

Energy gain: 20

Break: Main: 10.0

Deals Fire DMG equal to 100% of SAM's ATK to a single target enemy.

Basic ATK

Enhanced

Fyrefly Type-IV: Pyrogenic Decimation

Single Target

Lv. 6

Energy gain: -

Break: Main: 15.0

Restores HP by an amount equal to 20.0% of this unit's Max HP. Deals Fire DMG equal to 200% of SAM's ATK to a single target enemy.

Skill

Order: Aerial Bombardment

Single Target

Lv. 10

Energy gain: -

Break: Main: 20.0

Consumes HP equal to 40.0% of this unit's Max HP and regenerates a fixed amount of Energy equal to 60.0% of this unit's Max Energy. Deals Fire DMG equal to 200% of SAM's ATK to a single target enemy. If the current HP is not sufficient, reduces SAM's HP to 1 when using this Skill. Advances this unit's next Action by 25.0%.

Skill

Enhanced

Fyrefly Type-IV: Deathstar Overload

Blast

Lv. 10

Energy gain: -

Break: Main: 30.0 / AoE: 15.0

Restores HP by an amount equal to 25.0% of this unit's Max HP. Applies Fire Weakness to a single target enemy, lasting for 2 turn(s). Deals Fire DMG equal to (0.2 × Break Effect + 200%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 100%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360.0%.

Ultimate

Fyrefly Type-IV: Complete Combustion

Enhance | 240 energy cost

Lv. 10

Energy gain: 5

Enters the Complete Combustion state, advances this unit's Action by 100%, and gains Enhanced Basic ATK and Enhanced Skill. While in Complete Combustion, increases SPD by 60, and when using the Enhanced Basic ATK or Enhanced Skill, increases this unit's Weakness Break Efficiency by 50.0% and the Break DMG dealt by SAM to the enemy targets by 20.0%, lasting until this current attack ends.
A countdown timer for the Complete Combustion state appears in the Action Order. When the countdown timer's turn starts, SAM exits the Complete Combustion state. The countdown timer has a fixed SPD of 70.
SAM cannot use Ultimate while in Complete Combustion.

Talent

Chrysalid Pyronexus

Defensive

Lv. 10

Energy gain: -

The lower the HP, the less DMG received. When HP is 20.0% or lower, the DMG Reduction reaches its maximum effect, reducing up to 40.0%. During the Complete Combustion, the DMG Reduction remains at its maximum effect, and the Effect RES increases by 30.0%.
If Energy is lower than 50.0% when the battle starts, regenerates Energy to 50.0%. Once Energy is regenerated to its maximum, dispels all debuffs on this unit.

Technique

Δ Order: Meteoric Incineration

Technique

Energy gain: -

Break: Main: 20.0

Leaps into the air and moves about freely for 5 seconds, which can be ended early by launching a plunging attack. When the duration ends, plunges and immediately attacks all enemies within a set area. At the start of each wave, applies a Fire Weakness to all enemies, lasting for 2 turn(s). Then, deals Fire DMG equal to 200% of SAM's ATK to all enemies.

Major Traces

Module α: Antilag Outburst

Major trace

During the Complete Combustion, attacking enemies that have no Fire Weakness can also reduce their Toughness, with the effect being equivalent to 55.0% of the original Toughness Reduction from abilities.

Module β: Autoreactive Armor

Major trace

When SAM is in Complete Combustion with a Break Effect that is equal to or greater than 200%/360.0%, attacking a Weakness-Broken enemy target will convert the Toughness Reduction of this attack into 1 instance of 35.0%/50.0% Super Break DMG.

Module γ: Core Overload

Major trace

For every 10 point(s) of SAM's ATK that exceeds 1800, increases this unit's Break Effect by 0.8%.

Minor Traces

Break Effect

+37.3%

Effect Resistance

+18.0%

SPD

Eidolons

In Reddened Chrysalis, I Once Rest

Eidolon 1

When using the Enhanced Skill, ignores 15.0% of the target's DEF. The Enhanced Skill does not consume Skill Points.

From Shattered Sky, I Free Fall

Eidolon 2

While in Complete Combustion, using the Enhanced Basic ATK or the Enhanced Skill to defeat an enemy target or to Break their Weakness allows SAM to immediately gain 1 extra turn. This effect can trigger again after 1 turn(s).

Amidst Silenced Stars, I Deep Sleep

Eidolon 3

Skill Lv. +2, up to a maximum of Lv. 15.
Basic ATK Lv. +1, up to a maximum of Lv. 10.

Upon Lighted Fyrefly, I Soon Gaze

Eidolon 4

While in Complete Combustion, increases SAM's Effect RES by 50.0%.

From Undreamt Night, I Thence Shine

Eidolon 5

Ultimate Lv. +2, up to a maximum of Lv. 15.
Talent Lv. +2, up to a maximum of Lv. 15.

In Finalized Morrow, I Full Bloom

Eidolon 6

While in Complete Combustion, increases SAM's Fire RES PEN by 20.0%. When using the Enhanced Basic ATK or Enhanced Skill, increases Weakness Break Efficiency by 50.0%.

Stats and Ascension Materials

Lv. 1

Base Stats

111

ATK

DEF

106

SPD

104

Ascension Materials

Credits

308000

Tatters of Thought

Fragments of Impression

Raging Heart

Shards of Desires

Firefly Voice Actors

Analesa Fisher

Kusunoki Tomori

Song Yuanyuan

Yu Hye-ji

Shikhu

Staff Author

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This guide has been written by Shikhu (Discord - Shikhu). A long-time Honkai Star Rail player since launch experiencing everything the game has to offer from building his favourite characters to clearing MoC, PF and AS on the regular.