Firefly
Last updated 2026-04-24
Firefly, originally designated AR-26710, is a playable character in Honkai: Star Rail.
A member of the Stellaron Hunters and a young girl clad in a mechanical armor "SAM."
Born as a weapon, she's afflicted with the agony of Entropy Loss Syndrome due to genetic modification. She joined the Stellaron Hunters in search of the meaning of life, relentlessly pursuing ways to defy fate.[8]
Combat Info
Ascensions and Stats
| Ascension Phase | Level | Base HP | Base ATK | Base DEF | Base SPD | Ascension Costs |
|---|---|---|---|---|---|---|
| 0✦ | 1/20 | 110 | 71 | 105 | 104 | (0 → 1) |
| 20/20 | 216 | 138 | 205 | 104 | ||
| Ascension Cost (0 → 1) | ||||||
| 1✦ | 20/30 | 260 | 167 | 248 | 104 | (1 → 2) |
| 30/30 | 316 | 203 | 300 | 104 | ||
| Ascension Cost (1 → 2) | ||||||
| 2✦ | 30/40 | 360 | 231 | 343 | 104 | (2 → 3) |
| 40/40 | 415 | 267 | 396 | 104 | ||
| Ascension Cost (2 → 3) | ||||||
| 3✦ | 40/50 | 460 | 295 | 438 | 104 | (3 → 4) |
| 50/50 | 515 | 331 | 491 | 104 | ||
| Ascension Cost (3 → 4) | ||||||
| 4✦ | 50/60 | 559 | 359 | 533 | 104 | (4 → 5) |
| 60/60 | 615 | 395 | 586 | 104 | ||
| Ascension Cost (4 → 5) | ||||||
| 5✦ | 60/70 | 659 | 424 | 628 | 104 | (5 → 6) |
| 70/70 | 715 | 459 | 681 | 104 | ||
| Ascension Cost (5 → 6) | ||||||
| 6✦ | 70/80 | 759 | 488 | 723 | 104 | — |
| 80/80 | 814 | 523 | 776 | 104 | ||
308,000 Credit
65 Raging HeartAbilities
- Base
- Enhanced
| Icon | Type | Name | Tag | Energy | Toughness Reduction | ||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Basic ATK | Order: Flare Propulsion | Single Target | Generation: 20 | 10 | ||||||||||||||||||||||||||||||||||||||||||||||||
 | Basic ATK | Fyrefly Type-IV: Pyrogenic Decimation | Single Target | Generation: 0 | 15 | ||||||||||||||||||||||||||||||||||||||||||||||||
Restores HP by an amount equal to 20% of this unit's Max HP. Deals Fire DMG equal to 100%—220% of SAM's ATK to a single target enemy.
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 | Skill | Order: Aerial Bombardment | Single Target | Generation: 0 | 20 | ||||||||||||||||||||||||||||||||||||||||||||||||
Consumes HP equal to 40% of this unit's Max HP and regenerates a fixed amount of Energy equal to 50%—62% of this unit's Max Energy. Deals Fire DMG equal to 100%—220% 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%.
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 | Skill | Fyrefly Type-IV: Deathstar Overload | Blast | Generation: 0 | 30 (Main) 15 (Adjacent) | ||||||||||||||||||||||||||||||||||||||||||||||||
Restores HP by an amount equal to 25% 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 + 100%—220%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 50%—110%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
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 | Ultimate | Fyrefly Type-IV: Complete Combustion | Enhance | Cost: 240 Generation: 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 30—66, and when using the Enhanced Basic ATK or Enhanced Skill, increases this unit's Weakness Break Efficiency by 50% and the Break DMG dealt by SAM to the enemy targets by 10%—22%, lasting until this current attack ends.
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 | Talent | Chrysalid Pyronexus | Defense | ||||||||||||||||||||||||||||||||||||||||||||||||||
The lower the HP, the less DMG received. When HP is 20% or lower, the DMG Reduction reaches its maximum effect, reducing up to 20%—44%. During the Complete Combustion, the DMG Reduction remains at its maximum effect, and the Effect RES increases by 10%—34%.
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 | Technique | Δ Order: Meteoric Incineration | 20 | ||||||||||||||||||||||||||||||||||||||||||||||||||
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. | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| Icon | Type | Name | Tag | Energy | Toughness Reduction | |||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Skill | Fyrefly Type-IV: Deathstar Overload | Blast | Generation: 0 | 30 (Main) 15 (Adjacent) | |||||||||||||||||||||||||||||||||||||||
Restores HP by an amount equal to 25% of this unit's Max HP. Adds Fire Weakness to one designated enemy and its adjacent targets, lasting for 2 turns. Deals Fire DMG equal to (0.2 × Break Effect + 100%-220%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 50%-110%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
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Traces
| Trace Level | Required Ascension | Credits [Subtotal] | Character Ascension Materials and Trace Materials [Subtotal] | Trace Materials [Subtotal] |
|---|---|---|---|---|
| 1 → 2 | 2✦ | 5,000 [5,000] |  6 [6] |  3 [3] |
| 2 → 3 | 3✦ | 10,000 [15,000] |  3 [3] |  3 [3] |
| 3 → 4 | 4✦ | 20,000 [35,000] | 4 [7] | 5 [8] |
| 4 → 5 | 5✦ | 45,000 [80,000] |  3 [3] |  3 [3] |
| 5 → 6 | 6✦ | 160,000 [240,000] | 4 [7] | 8 [11] |
240,000 Credit| Trace Level | Required Ascension | Credits [Subtotal] | Character Ascension Materials and Trace Materials [Subtotal] | Trace Materials [Subtotal] | ||
|---|---|---|---|---|---|---|
| 1 → 2 | 1✦ | 2,500 [2,500] | 3 [3] | |||
| 2 → 3 | 2✦ | 5,000 [7,500] | 6 [9] | 3 [3] | ||
| 3 → 4 | 3✦ | 10,000 [17,500] | 3 [3] | 3 [3] | ||
| 4 → 5 | 4✦ | 20,000 [37,500] | 4 [7] | 5 [8] | ||
| 5 → 6 | 30,000 [67,500] | 6 [13] | 7 [15] | |||
| 6 → 7 | 5✦ | 45,000 [112,500] | 3 [3] | 3 [3] | ||
| 7 → 8 | 80,000 [192,500] | 4 [7] | 5 [8] |  1 [1] | ||
| 8 → 9 | 6✦ | 160,000 [352,500] | 8 [16] | 1 [2] |  1 [1] | |
| 9 → 10 | 300,000 [652,500] | 14 [30] | 1 [3] | 1 [2] | ||
652,500 Credit- Base
- Enhanced
 Break BoostBreak Effect increases by 5.3% | |||
 Module α: Antilag OutburstDuring the Complete Combustion, attacking enemies that have no Fire Weakness can also reduce their Toughness, with the effect being equivalent to 55% of the original Toughness Reduction from abilities. Req. Character Ascension 2 |
 Effect RES BoostEffect RES increases by 4.0% Req. Character Ascension 2 |
Break Boost Break Effect increases by 5.3% Req. Character Ascension 3 |
 SPD BoostSPD increases by 2 Req. Character Ascension 3 |
 Module β: Autoreactive ArmorWhen SAM is in Complete Combustion with a Break Effect that is equal to or greater than 200%/360%, attacking a Weakness-Broken enemy target will convert the Toughness Reduction of this attack into 1 instance of 35%/50% Super Break DMG. Req. Character Ascension 4 |
Break Boost Break Effect increases by 8.0% Req. Character Ascension 4 |
Effect RES Boost Effect RES increases by 6.0% Req. Character Ascension 5 |
Break Boost Break Effect increases by 8.0% Req. Character Ascension 5 |
 Module γ: Core OverloadFor every 10 point(s) of SAM's ATK that exceeds 1800, increases this unit's Break Effect by 0.8%. Req. Character Ascension 6 |
SPD Boost SPD increases by 3 Req. Character Ascension 6 |
Effect RES Boost Effect RES increases by 8.0% Req. Character Lv. 75 | |
| Break Boost Break Effect increases by 10.7% Req. Character Lv. 80 | |||
| Icon | Name | Ascension | |
|---|---|---|---|
 | Module α: Antilag Outburst | 2 | |
| While in the Complete Combustion state, SAM's Break Effect increases by 25%. When using Enhanced Basic ATK or Enhanced Skill to inflict Weakness Break on a target, the Complete Combustion countdown is delayed by 10%. This effect can trigger a maximum of 3 time(s) during each Complete Combustion state. | |||
 | Module β: Autoreactive Armor | 4 | |
| When SAM is in Complete Combustion with a Break Effect that is equal to or greater than 150%/300%, attacking a Weakness-Broken enemy target will convert the Toughness Reduction of this attack into 1 instance of 100%/150% Super Break DMG. | |||
Eidolons
- Base
- Enhanced
| Icon | Name | Level |
|---|---|---|
 | In Reddened Chrysalis, I Once Rest | 1 |
| When using the Enhanced Skill, ignores 15% of the target's DEF. The Enhanced Skill does not consume Skill Points. | ||
 | From Shattered Sky, I Free Fall | 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).
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 | Amidst Silenced Stars, I Deep Sleep | 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 | 4 |
| While in Complete Combustion, increases SAM's Effect RES by 50%. | ||
 | From Undreamt Night, I Thence Shine | 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 | 6 |
| While in Complete Combustion, increases SAM's Fire RES PEN by 20%. When using the Enhanced Basic ATK or Enhanced Skill, increases Weakness Break Efficiency by 50%. | ||
| Icon | Name | Level |
|---|---|---|
| From Shattered Sky, I Free Fall | 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 only trigger 1 time per turn, and the trigger count resets at the start of SAM's turn. | ||
Achievements
There are 6 Achievements related to Firefly:
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Name | Category | Description | Hidden | Version | 
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|---|---|---|---|---|---|---|
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Going My Way | The Rail Unto the Stars | Encounter the Astral Express unexpectedly ※ As Firefly, run into the Express Crew on the Radiant Feldspar |
Yes | 2.3 | 10 |
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On the Road | The Rail Unto the Stars | Pass by the Astral Express ※ As Firefly, focus on finding the "Bonajade Exchange" aboard the Radiant Feldspar |
Yes | 2.3 | 10 |
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Save the Cat! | Eager for Battle | Win 1 battle(s) with a team comprising Silver Wolf, Blade, Kafka, and Firefly | Yes | 2.3 | 5 |
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Go, Bla— SAM | Eager for Battle | Use ally Firefly in combat against boss Kafka and be Dominated by her | Yes | 2.3 | 5 |
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I Will... Set the Seas Ablaze! | Eager for Battle | In a single battle, use Fyrefly Type-IV: Deathstar Overload 4 time(s) before the Complete Combustion state ends while using SAM | Yes | 2.3 | 5 |
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Seeing Summer | Eager for Battle | Win 1 battle(s) with a team comprising Firefly and (Trailblazer) | Yes | 2.3 | 5 |
Availability
Event Warps
Firefly has been promoted or featured with a drop-rate boost in 5 Event Warps:
| Warp | Featured | Duration | Version |
|---|---|---|---|
 Firefull Flyshine 2024-06-19 |
  Firefly |
June 19, 2024 – July 10, 2024 | 2.3 |
 Firefull Flyshine 2024-12-25 |
Firefly |
December 25, 2024 – January 14, 2025 | 2.7 |
 Indelible Coterie 2025-07-23 |
Firefly |
July 23, 2025 – August 12, 2025 | 3.4 |
 Firefull Flyshine 2025-12-17 |
Firefly |
December 17, 2025 – January 7, 2026 | 3.8 |
 Indelible Coterie 2026-04-22 |
Firefly |
April 22, 2026 – May 13, 2026 | 4.2 |
Other Languages
| Language | Official Name |
|---|---|
| English | Firefly |
| Chinese (Simplified) | 流萤 |
| Chinese (Traditional) | 流螢 |
| Japanese | ホタル |
| Korean | 반디 |
| Spanish | Luciérnaga |
| French | Luciole |
| Russian | Светлячок |
| Thai | Firefly |
| Vietnamese | Firefly |
| German | Glühwürmchen |
| Indonesian | Firefly |
| Portuguese | Vaga-lume |
Change History
- Updates to character voice-overs:
- New voice-over for All Languages:
- "About Mortenax Blade"
- "Added to Team With Mortenax Blade"
- New voice-over for All Languages:
- Firefly's abilities were permanently enhanced as part of Novaflare.
- Updates to character voice-overs:
- New voice-over for All Languages:
- "About Silver Wolf LV.999"
- "Added to Team With Silver Wolf LV.999"
- New voice-over for All Languages:
- Updates to character voice-overs:
- New voice-over for All Languages:
- "About The Dahlia"
- "Added to Team With The Dahlia"
- New voice-over for All Languages:
- Firefly was released as a playable character.
- Firefly was introduced as an upcoming playable character.
- Firefly was released as a mission-exclusive NPC.
- Firefly was introduced.
References
- ↑ Relic, Iron Cavalry Against the Scourge: Iron Cavalry's Skywalk Greaves
"New humans are continuously birthed from incubators and given numbers and missions, while old humans hide beneath steel barriers, anxiously enjoying the long-awaited peace they yearned for." - ↑ Trailblaze Mission, Farewell, Penacony: Soldier's Pay
Jade: I wonder what they are like, and if all Stellaron Hunters are like you... Traveling on the Path of Finality but struggling against your destiny, attempting to move in the opposite direction? - ↑ Trailblaze Mission, Heroic Saga of Flame-Chase: Night Veil, Shroud the Silent Past
- ↑ Trailblaze Mission, Memories are the Prelude to Dreams: The Dream Split in Two
- ↑ 5.0 5.1 5.2 5.3 5.4 5.5 Chinese Character Reveal, Honkai: Star Rail Bilibili. Retrieved April 25, 2024.
- ↑ 6.0 6.1 崩壊：スターレイル (June 11, 2024). 千の星を巡る紀行PV「今、同じ星空の下で」. YouTube. Retrieved June 13, 2024.
- ↑ Firefly's Character Page, Honkai: Star Rail Official Website. Retrieved June 19, 2024.
- ↑ Character Reveal, Honkai: Star Rail Twitter. Retrieved April 23, 2024.
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