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Top Honkai Star Rail Firefly Build Guide: Light Cones and Relics Explained

Top Honkai Star Rail Firefly Build Guide: Light Cones and Relics Explained

Firefly stands out as a remarkable 5-Star character in Honkai Star Rail, particularly when her abilities are fully optimized and she is teamed up with effective allies. A crucial part of her synergy comes from pairing her with the Harmony Trailblazer, a free character that players can easily acquire. To maximize Firefly’s potential, it’s essential to devote significant resources to enhancing her skills and Traces.

Firefly excels at inflicting Fire weakness on her enemies, thanks to her Enhanced Skill, leading to impressive Break and Super Break damage. Once you’ve established an effective team around her, Firefly can dominate the game, swiftly progressing through challenging content. Below, you will find the optimal build for Firefly in Honkai Star Rail to help you achieve this goal.

Optimal Build for Firefly in Honkai Star Rail

This 5-Star character belongs to the Path of Destruction and harnesses the power of the Fire element. As one of the Stellaron Hunters, she transforms into a formidable mech called SAM during battles.

Firefly’s Ultimate, referred to as Complete Combustion, propels her into the SAM state. This transformation provides a 100% action boost, enhances her Basic Attack and Skill, and increases her Speed by an impressive 60%. During this period, her enhanced attacks benefit from a 50% boost to Weakness Break Efficiency and an additional 20% increase to Break damage until her turn concludes.

While in her Ultimate state, Firefly can use her Enhanced Skill to regenerate her health and inflict Fire Weakness on a target for two turns. This interaction allows her to unleash significant Fire Damage, which effectively scales with her Break Effect stats.

Firefly’s Technique also proves beneficial, allowing her to engage in free movement outside of combat for a few moments before launching an attack on a selected enemy. This tactic can quickly conclude encounters with standard foes, making battles both efficient and enjoyable.

The best 4-Star Light Cone for Firefly are shown in the character menu in Honkai Star Rail
Image credit: HoYoverse/VG247

Best Light Cones for Firefly

Top-tier 5-Star Light Cones

Firefly’s signature Light Cone, Whereabouts Should Dreams Rest, is the ultimate choice for her setup. It boosts her Break Effect by 60%, and each instance of Break Damage she inflicts subsequently applies Routed to the enemy for two turns. Enemies marked with Routed suffer a 24% increase in Break Damage from Firefly’s attacks while their Speed decreases by 20%—this makes it incredibly advantageous.

An excellent 5-Star alternative is On the Fall of the Aeon, which offers an 8% attack boost stacking up to four times. When Firefly triggers a Weakness Break, her damage escalates by 12% for the subsequent two turns—upgrading this Light Cone will significantly enhance its effectiveness.

Notable 4-Star Light Cones

For 4-Star options, Indelible Promise is the best pick. It raises Firefly’s Break Effect by 28% and increases her Critical Rate by 15% for two turns following the use of her Ultimate. While it may not be the strongest Light Cone, it offers essential Break Effect improvements while you aim to secure a 5-Star option.

The best Relics for Firefly are shown in the character menu in Honkai Star Rail
Image credit: HoYoverse/VG247

Optimal Relics for Firefly

Firefly benefits most from the Iron Cavalry Against the Scourge Relic set, which provides significant advantages:

  • Two-piece effect: Enhances Break Effect by 16%.
  • Four-piece effect: If the wearer’s Break Effect is at least 150%, they ignore 10% of the enemy’s DEF when executing Break Damage and an additional 15% for Super Break Damage.

This Relic set significantly amplifies Firefly’s Break Effect while simultaneously limiting the enemy’s defensive capabilities. Another alternative is the Thief of Shooting Meteor set, which also increases Break Effect by 16% and grants three Energy when a Weakness Break is inflicted. However, as Firefly regenerates energy rapidly, the additional Energy may be less beneficial.

Relic Stat Priorities

  • Body: Attack %
  • Feet: Speed

To optimize Firefly, focus on enhancing her Speed, Break Effect, and Attack %. Once her Speed reaches a pivotal breakpoint, prioritize Attack % and Break Effect—other stats can be considered lower priority since Firefly efficiently manages Energy and HP on her own, leaving healing to a dedicated healer.

Firefly Ornaments

The most suitable Ornament set for Firefly is Forge of the Kalpagni Lantern. This provides a 6% Speed boost and enhances her Break Effect by 40% for one turn when targeting an enemy with Fire Weakness. Given Firefly’s ability to inflict Fire Weakness, she can consistently access this bonus.

An alternative Ornament set is Talia: Kingdom of Banditry, which increases her Break Effect by 16%. If her Speed reaches 145 or above, she gains an extra 20% boost to her Break Effect.

Ornament Stat Focus

  • Sphere: Attack %
  • Link Rope: Break Effect

Firefly Traces Priority

When leveling Firefly’s Traces, prioritize in the following order:

  • Ultimate
  • Skill
  • Talent
  • Basic Attack

Firefly’s Ultimate should be prioritized, as this is where her highest damage output occurs, and she will usually initiate her attacks from this state. Next, allocate resources to her Skill, as this will be crucial while utilizing her Ultimate, allowing her to inflict Fire Weakness and deal substantial damage aligned with her Break Effect stats.

Following the Skill, focus on her Talent, which mitigates incoming damage while regenerating her Energy. The Basic Attack should be the last focus area for resource allocation.

Firefly Ascension Materials

To ascend Firefly from level one to level eighty, the following materials are required:

  • 15x Tatters of Thought
  • 15x Fragments of Impression
  • 15x Shard of Desires
  • 65x Raging Hearts
  • 308,000x Credits
From left to right: Firefly, Gallagher, Harmony Trailblazer, and Ruan Mei are shown on the team lineup screen in Honkai Star Rail
Image credit: HoYoverse/VG247

Best Team Composition for Firefly

The most effective teams featuring Firefly prominently include the Harmony Trailblazer to enhance her capabilities, a character that is readily available through the game’s Trailblaze Missions. Ideal teammates like Ruan Mei and Gallagher can round out the team, although various alternatives exist.

  • Firefly
  • Harmony Trailblazer
  • Ruan Mei
  • Gallagher

If you possess Ruan Mei, she is an excellent choice as she boosts the Weakness Break Efficiency and all-type resistance of the entire party, allowing Firefly and the Trailblazer to benefit greatly from her presence. Additionally, Ruan Mei can also contribute significant damage.

Gallagher provides healing support through his Skill while primarily serving as an attacker with both Basic Attack and Ultimate, helping to conserve skill points for the rest of the team.

For composition flexibility, you could replace Gallagher with Lingsha, another fiery healer, or Aventurine, who can provide shielding to the team. However, Gallagher generally fits well within this dynamic.

Is Firefly Worth It in Honkai Star Rail?

Firefly proves to be a valuable asset in Honkai Star Rail and ranks among the top characters for Break Effect, especially if players are willing to invest in her stats and leverage synergy with the Harmony Trailblazer. Obtaining her first Eidolon, known as In Reddened Chrysalis, I Once Rest, enhances her Enhance Skill by allowing it to ignore 10% of the target’s DEF.

If you already have Ruan Mei, integrating Firefly into your lineup is a straightforward decision, as several of her optimal team members are accessible to free-to-play players. Firefly excels in navigating content efficiently, even with less-than-perfect stats, cementing her status as an impressive character worth pursuing should she return to Honkai Star Rail’s banners.

To explore more about Honkai Star Rail, check out our builds for the Physical Trailblazer and Fire Trailblazer. Don’t miss out on our Honkai Star Rail codes for some free Stellar Jade to enhance your warping experience!

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