Firefly in Honkai Star Rail: Build Guide and Top Teams

Firefly in HSR is a legendary character of the Path of Destruction of the Fire type, during the battle she focuses on destroying opponents by breaking through vulnerabilities in a strengthened state, "Complete combustion", which becomes active after using the superpower. This feature is key to the Stellaron hunter's combat mechanics, since during its action the girl effectively reduces the enemy's resistance bar and inflicts huge "super break" damage.

Sam is a versatile DPS unit: she excels in a variety of content due to his high and stable damage and built-in buffs. This allows the heroine to quickly complete AoE and solo endgame activities, and among her allies you can find a fair number of available heroes who can provide good bonuses.

How to Get the Character

To obtain Firefly, take part in the "Event Warp: Firefull Flyshine" in the second half of the 3.4 update "For the Sun is Set to Die". Banner duration: July 23, 2025 to August 12, 2025.

If you don't want to miss the next Firefly rerun, bookmark our banner schedule with up-to-date information about "Warps".

Strengths and Weaknesses

Before we move on to exploring the character's build, let's briefly outline her main "pros" and "cons":

Best Firefly Builds in Honkai: Star Rail

The girl adheres to the style of play through reducing toughness of enemies and then inflicting "super-break damage". The ability to attack with this type is provided through the state of "Complete combustion", which can only be accessed after activating the superpower. Despite the high cost of this skill, the need to collect "energy recovery" no: The required amount of energy is accumulated after two uses of the skill.

As a result, Firefly builds in the HSR should take into account the needs of the "hunter" in both the normal and reinforced stances:

1. To enter the "Complete Combustion" state, you need to wait for your turn and use the skill, therefore, you will need to invest in speed for more frequent actions.
2. A high value of of break effect (hereinafter referred to as "BE") is required, since the “super break damage” depends on this parameter. The characteristic is gained with relics and cones, as well as through the work of the “Module γ: Core Overload” trace, which is responsible for converting attack power (hereinafter referred to as "ATK").

As for survivability, Sam gets high resistance to effects through the talent tree, so health and defense increases are considered exclusively through additional procs in the "lower" parameters.

Recommended Stats

Main stats on parts of cavern relics and planar ornaments:

Priority of additional characteristics:

Speed > break effect > attack power in %

Optimal stat values at level 80

As a result, upon reaching the maximum level and fully equipped, the main combat characteristics should reach the following value:

• HP — 2+;
• speed — 150 before entering the “Complete Combustion” state and 210 after using the superpower;
• break effect — 360% (highly mandatory).

Light Cone Rating

Among the Destruction weapon "cards", the most attractive choices for Sam will be the options that offer increased break and ATK:

Light cone	Effect	Recommendation
Whereabouts Should Dreams Rest ⭐⭐⭐⭐⭐ HP 53-1164 ATK 22-476 DEF 24-529	Break effect is increased by 60-100%. When the wearer deals break damage to a target, the target gains the status "Routed" for 2 turns (effects of this type cannot be stacked). Break damage to an enemy affected by the named debuff is increased by 24-40%, the enemy also suffers a speed reduction of 20%.	Signature Light Cone offers the girl a boost to her basic mechanics through significant increases to BE and negative status on enemies. At the first level of imposition, the weapon provides a high increase to the characteristic without additional conditions. In the process of fighting monsters, the heroine easily activates the second part of the passive effect, increasing the strength of outgoing damage.
On the Fall of an Aeon (S5) | F2P ⭐⭐⭐⭐⭐ HP 48-1058 ATK 24-529 DEF 18-396	When the owner hits with any skill, the light cone increases their attack power by 8-16% in this battle (effect stacks up to 4 times). When the owner breaks the enemy's vulnerability, the damage dealt by him receives an additional increase in the form of 12-24% for 2 turns.	Thanks to the trace "Module γ: Core Overload" the weapon from Herta's shop is a worthy competitor to the Signature at max. superimposition level. However, to get the full ATK bonus, which converts to BE, you will first need to perform 4 hits.
Indelible Promise ⭐⭐⭐⭐ HP 43-952 ATK 22-476 DEF 15-331	Break effect is increased by 28-56%. When the wearer uses a super ability, their critical chance increases by 15-30% for 2 turns.	Alternative option: with its help you can upgrade break effect to optimal values.
The Moles Welcome You ⭐⭐⭐⭐ HP 48-1058 ATK 21-476 DEF 12-264	Using a basic attack, skill, or super ability grants one level of "Mischief". Each level increases the attack power by 12-24%.	A good option for ATK, which in total can offer an increase to the named characteristic in the amount of 36-72% depending on the level of superimposition.

In addition to the weapons options considered, the following equipment is acceptable:

• "Something Irreplaceable" (Legendary) - ATK bonus and passive healing - meets the basic requirements of the character, additionally opening up the mechanics of self-healing, which can be useful during the passage of endgame modes.
• Nowhere to Run (epic) and Woof! Walk Time! (epic) - additional alternative for attack power increases: can be used before receiving "On the Fall of an Aeon" or other previously discussed options.

What relics and ornaments are needed

Like weapons, artifacts are designed to enhance the key stat, "break effect" and alternative parameter, attack power. Since the mechanics of reducing toughness are enhanced by cutting off protection, specialized sets for ignoring resists can be additionally considered.

Cavern relics

Set and its effects	Recommendation
Iron Cavalry Against the Scourge 2 parts: break effect +16%. 4 parts: If the wearer's break effect is greater than or equal to 150%, they ignore 10% of the enemy's defense when dealing break damage. If break effect is greater than or equal to 250%, super break damage they deal additionally ignores 15% of defense.	The best set, combining everything the character needs. Provides Sam with an increase in BE, which must be collected from any sources. Additionally, break and super break damage are affected by the state of enemy defense, and ignoring resistances will have a positive effect on the main source of DPS.
Thief of Shooting Meteor 2 parts: break effect +16%. 4 parts: break effect +16%. When the owner breaks the enemy's vulnerability, they also recover 3 energy.	For the heroine, the set is a full-fledged analogue of the build in 2x2 format, which offers an increase to the most significant stat in the form of 32%.

Planar ornaments

Set and its effects	Recommendation
Forge of the Kalpagni Lantern 2 parts: Speed ​​+6%. If the owner hits an enemy with Fire Vulnerability, their break Effect is increased by 40% for 1 turn.	A signature set that matches the heroine's needs and is easy to activate. As a main effect, it increases speed, and when striking monsters with a fire weakness, it significantly increases the main stat. The character's skills contain an imposition of vulnerability to his element, so the bonus can be maintained throughout the battle.
Talia: Kingdom of Banditry 2 parts: break effect +16%. If the owner's speed is greater than or equal to 145, then his break effect increases by an additional 20%.	Ornaments with a total increase in the form of 36% BE can be equipped as a replacement. Considering that Sam requires 140-150 of "pure" speed to play comfortably, maintaining the full bonus to the main stat will not be a problem.

Team Guide for Firefly in HSR

In a team, Firefly plays the role of a damage dealer and plays from a specific mechanic tied to reducing the vulnerability scale and inflicting "super-break damage" on enemies in a state of destroyed toughness. As a result, due to the named feature, she requires narrowly focused supports in the team.

Which heroes are suitable?

The following units will offer Sam a high level of synergy:

Character	Features
The Trailblazer (Harmony)	Is the best free partner for Sam, playing in similar mechanics. Not only helps to gain additional BE, but also gives the opportunity to deliver several blows with "super-break damage", which is what the girl in mech armor specializes in.
Ruan Mei	A universal support that increases the effectiveness of break of any groups. This ability has a positive effect on "super break damage", the work of which is provided through the trace "Module β: Autoreactive Armor". In addition, the scientist increases the team's speed and break effect, and also does not allow enemies to restore the stamina bar for a long time.
Fugue	Replaces the scientist Ruan Mei or the MC of Harmony, and can also be placed in the squad in the third position along with the already named heroes. Increases BE, decreases the defense of enemy targets, and supports the team with additional damage.
Tribbie	The Amphoreus Messenger increases the break of all resistance types and damage taken by enemies. Needs a partner who hits the area to charge the ult faster. The "Hunter" attacks several targets and gathers through speed, thereby steadily restoring energy to the messenger.
Lingsha	A support with a variety of functions: heals, deals area damage and applies a debuff that increases damage from toughness break. During combat, summons an assistant, whose attacks are a bonus attack. Due to it, he additionally heals, deals damage out of turn and removes debuffs.
Gallagher	A healer and secondary damage dealer who relies on the "break effect" stat. Applies the Besotted status to enemies, which restores health to allied heroes after they strike, and also increases damage from break.
Rappa	A galactic ranger with high AoE efficiency, who plays from BE and is capable of constantly dealing massive imaginary damage. Good for completing Pure Fiction. In cooperation with Sam, to achieve maximum efficiency, it may require abandoning sustain, giving preference to the combo => two DPS representatives + two (de-)buffers.
Boothill	The cowboy plays from breaking vulnerability and is in squads with similar supports as the "hunter". Due to the lack of AoE damage, she may need the support of an area damage dealer. However, when cooperating, it is important to monitor the skill points used and their total number. In addition, similar to Rappa, in certain situations it is recommended to abandon healers/shielders to achieve maximum DPS.
March 7 (Hunting)	A free ally for a secondary support position, capable of appointing a chosen ally as a mentor and, depending on their Path, offering third-party buffs. In particular, it fits well in BE groups and can be built into this stat.

Best team samples

Based on the following examples, you can create your own squad where the hunter heroine is a hyper-carry:

Character 1	Character 2	Character 3	Character 4	Features
Firefly	Fugue	Ruan Mei	Lingsha	A legendary team that is perfect for Sam. Key supports increase break effect, save action points (long duration of spread buffs), and also weaken enemies. Lingsha increases damage from team mechanics, actively and passively heals, quickly gets rid of any negative statuses and deals additional damage.
Firefly	MC Harmony	Ruan Mei	Gallagher	A more budget-friendly team option that still uses skill points, an important resource for Sam, sparingly. The MC (Harmony) helps deal damage, while Ruan Mei is fully focused on activating and maintaining spread bonuses. Gallagher increases break damage, heals quickly, and generates skill points on a constant basis.
Firefly	MC Harmony	Ruan Mei	Fugue Tribbie	An extremely effective squad, where the huntress girl gets the maximum amount of buffs. The only problem is that the group lacks a healer/shielder - this, in turn, can have a negative impact during the passage of endgame modes and other activities in which you have to fight with targets dense in HP.
Firefly	Boothill Rappa	Fugue	Lingsha Ruan Mei MC Harmony	An alternative option for a solo and AoE focused group (depending on the DPS representative via the BE mechanic chosen for the second position). The option with Boothill is suitable for battles against large solo bosses, while cooperation with Rappa will show itself well in Pure Fiction.
Firefly	March 7	MC Harmony	Gallagher	F2P example, set up with available ally options. In this case, March 7 Path of the Hunt is built into break, and its skill boost is given to the Harmony MC or Gallagher for the stamina damage buff.

All about leveling

The table shows the resources for upgrading the heroine, as well as enhancing abilities and unlocking the talent tree:

In total, to fully strengthen the Firefly you will need:

• Credits ×3 888 000;
• Traveler's Guide × 289, Adventure Log × 6, Travel Encounters × 16;
• Tatters of Thought × 56, Fragments of Impression × 71, Shards of Desires × 73 — a resource dropped by Memes in Penacony and Simulated Universe;
• Borisin Teeth × 18, Lupitoxin Sawteeth × 69, Moon Rage Fang × 139 — reward for completing the "Calyx (crimson)" in Scalegorge Waterscape;
• Raging Heart × 65 - reward for the "Stagnation Shadow" challenge in Dewlight Pavilion;
• Lost Echo of the Shared Wish × 12 - reward for participating in the weekly activity Echo of War: Salutations of Ashen Dreams;
• Tracks of Destiny × 8.

How Firefly's Skills Work

The heroine plays from from break effect and belongs to the class of universal damage dealers of the "Destruction" path, therefore it has high single and mass DPS. Her specificity consists in consuming health to recharge the super ability, which costs 240 energy. In the enhanced state of the ultimate, buffs are active, and the skill and basic attack are replaced by other skills with increased damage and the ability to cause fire weakness in the enemy.

A regular skill helps fill the superpower energy by half, in exchange it takes away health. After switching to the ultimate stance, skills gradually restore the spent HP, simultaneously reducing the resistance of enemies and can inflict "super-break damage".

Active skills

First of all, it is worth exploring the main skills of the character, which include the technique, basic attack, skill and ult.

Passive Skills

Passive skills include the talent, aimed at increasing the survivability of the "hunter".

Leveling Order

Ultimate > skill/talent > basic attack

The overwhelming majority of damage comes from break and “super-break”, for which it is important to upgrade ultimate. Accordingly, it is recommended to spend resources on other skills after the superpower has been upgraded. Improving the talent is necessary if there is no healer or shielder in the team.

Traces

The total increase to each characteristic after learning "Traces":

• break effect - + 37.3 %
• resistance to effects - + 18 %
• speed - +5 .

Eidolons

Firefly's best eidolons are E1, E2 and E6.

• 1 — is aimed at increasing damage and reducing the consumption of command skill points. Due to the constant progression of the action, increased speed and the need to use the skill, the girl spends a significant part of the command resource in the normal state and in the ultimate stance.
• 2 — is the strongest, as it creates the opportunity to perform two actions in a row. Provided that the heroine is in the "Complete Combustion" stance and has broken through the vulnerability or completely destroyed the enemy, an additional blow can be made. Given the high efficiency of break and the constant imposition of weakness to its element, in a scenario of a battle with a large group of enemies, you can get quite a few consecutive turns.
• 6 — increases all damage dealt by ignoring enemy fire resistances. In addition, in addition to the initial 50% break efficiency, the heroine receives another +50%, which has a positive effect not only on reducing toughness, but also on damage from the "Module β: Autoreactive Armor" trace.

For F2P players, it is recommended to stop at the second const.

How to Play Firefly in HSR

The Stellaron Hunter focuses on breaking the toughness bar of enemy targets in the enhanced state of "Complete Combustion". The heroine can switch to the stance with the help of a skill that fills the energy of the super ability by 50%. While in "Complete Combustion", the girl receives updated abilities with a high decrease in the "shield" bar, significantly increases her own speed and can inflict "super-break damage".

Based on the characteristics of skills in stances, Firefly’s rotation is based on the following principle:

1. If there are buffers in the squad, use their techniques before launching Sam.
2. Thanks to the talent "Chrysalid Pyronexus", at the beginning of the battle the energy of the character's ultimate is always half full. On your turn, use the skill to fully charge the superpower.
3. Wait until all supports activate buffs and ultimates.
4. Use the super ability to gain 100% action advancement. Perform a skill attack to apply a fire weakness in AoE and remove most of the vulnerability bar.
5. In the following turns, when choosing between a basic attack and a skill at E0, proceed from the needs of the team, so as not to end up in a deficit of skill points. With E1, the enhanced skill does not spend team action points.
6. After exiting the Complete Combustion state, use the skill on the next two turns to repeat the rotation.

Is the character worth getting?

Firefly is a representative of the Path of Destruction with the fire element. In combat, she relies on the enhanced state of the SAM combat armor, which more effectively breaks the vulnerability of enemies, and also provides the opportunity for a "super-break" attack. The key advantage that ensures comfortable gameplay in any circumstances is the ability to impose a vulnerability to an element of her type on enemies. She demonstrates the greatest effectiveness in specialized builds focused on the break mechanics.

DPS characters of the Destruction path are in high demand when passing a variety of content, so it is worth pulling for the heroine for those who want to get a universal damage dealer. The unit differs from representatives of her path in her independence in any battle scenario due to the imposition of vulnerabilities and a stable decrease in toughness. Despite the high compatibility with the limited Ruan Mei, can form equally strong squads with epic alternatives. This also applies to the signature light cone, since it is not much inferior to the F2P weapon "On the Fall of an Aeon".

Which is better: signature or E1

The first eidolon seems to be a more profitable investment than the signature weapon. In the "Complete Combustion" state, the heroine's speed effortlessly reaches 200 speed with full leveling of boots for speed, traces and superpowers. In this case, up to 4 actions can be performed before the counter is triggered - alternate the basic blow and skill or spend most of the team skill points. With the first const, the enhanced skill can be used constantly, since it does not consume action points, in addition, it ignores the enemy's defense.

The advantage of the light cone is its high BE bonus. However, the "Module γ: Core Overload" trace offers an alternative way to gain the main stat through ATK. In such a situation, you can find a worthy replacement for the signature weapon, compensating for the less advantageous passive by increasing the damage of the eidolon.

Pulling for Ruan Mei or E1

Ruan Mei is a valuable acquisition for the account and a priority support, so she is obtained first. The heroine offers the group important increases in speed and BE, and also increases the effectiveness of break by 50% and does not allow enemies to restore stamina for a long time. In addition, the scientist is friendly to skill points, so she will help compensate for the lack of the first const.

It is important to note that the heroine of Harmony can be purchased in a specialized section of the in-game store for currency Golden Companion Spirit.

Firefly Trailers

Animated video introducing the girl in mechanical armor "Embers in a Shell":

YouTube

A video from the Keeping Up with Star Rail category, titled "Sea Fire Prevention Imperative":

YouTube

Trailer for 'A Journey Through a Thousand Stars', "The Same Sky and Stars":

YouTube

Short animated film "The Embers of Glamoth":

YouTube

We hope this guide helped you put together the best build for Firefly, the Stellaron hunter wearing SAM mechanical armor in Honkai: Star Rail. Feel free to ask questions in comments, so that the author or other players can help you.