Topaz Build, Light Cones & Teams | Honkai: Star Rail

Topaz & Numby is a 5-star Fire Hunt character in Honkai: Star Rail that functions quite differently from traditional single-target damage dealers, because of her focus on Follow-up attack synergy and specialized debuffing to support the team. Her kit revolves around her Skill to apply the Proof of Debt status and trigger Numby’s coordinated strikes, allowing the team to melt through enemies with high-frequency attacks. With this unique playstyle, Topaz is a top-tier sub-DPS for Follow-up-oriented teams that work with a variety of dual-carry setups.

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Topaz & Numby Character Overview

  • Topaz & Numby Information

Character Information
Topaz & NumbyRarity★★★★★
ElementFire
PathThe Hunt
Combat RoleSub-DPS / Follow-up Support
  • Topaz & Numby Gameplay

Topaz is a 5-star Fire Hunt character who specializes in single-target damage and enabling follow-up attack teams through her partner, Numby. Her Skill applies the Proof of Debt status to a single enemy, which increases the Follow-up ATK damage they receive by 50%. This unique mechanic makes her a premier sub-DPS and support for follow-up centric teams, providing a massive offensive debuff while remaining remarkably Skill Point-friendly in the right rotations.

Her combat utility revolves around the synergy between her Talent and the Proof of Debt mark. Numby acts as an independent unit on the action bar; however, whenever an enemy with Proof of Debt is hit by an ally's follow-up attack, Numby’s action is advanced forward by 50%. This allows Topaz to "piggyback" off her teammates' actions for frequent out-of-turn damage. Her Ultimate transitions Numby into the "Astonishing Rise!" state, significantly boosting its DMG multiplier and CRIT DMG. During this state, even ally Basic ATKs, Skills, and Ultimates will advance Numby's action, turning her into a relentless offensive engine.

Topaz's passive Traces are what truly solidify her position as a core teammate for follow-up attackers. Her A2 Trace is a game-changer, categorizing her Basic ATK as a Follow-up attack, which allows her to regenerate energy and advance Numby even when she is conserving Skill Points. Her A4 Trace provides a straightforward 15% DMG boost against enemies with Fire Weakness, reinforcing her efficiency in elemental matchups. Finally, her A6 Trace grants Topaz 15 Energy every time Numby attacks during her Ultimate state, acting as a battery that helps her maintain high Ultimate uptime and keep her damage output peaking.

image

Topaz & Numby Trace Priority

TracePriority
Talent★★★★★ (Top)
Skill★★★★★ (Top)
Ultimate★★★★☆ (High)
Basic★☆☆☆☆ (Low)

Topaz’s Talent and Skill are the top priority because they define her core identity as both a damage dealer and a follow-up enabler. The Talent directly increases Numby’s base damage scaling, and since Numby is the source of the vast majority of her output, this is non-negotiable. The Skill dictates the strength of the Proof of Debt debuff, which is the primary reason she is so valuable, as it amplifies all follow-up damage the enemy receives from her and her teammates.

Her Ultimate is a high priority as well. It provides a significant boost to Numby’s Crit DMG and total DMG while in the Windfall Bonanza! state. Investing in this ensures your burst windows are as impactful as possible, allowing Numby to shred through high-health targets more efficiently during its enhanced turns.

Topaz’s Basic ATK is the lowest priority. You’re mainly using it to generate Skill Points or cycle Numby's action bar, so the damage scaling isn't the focus. Instead, prioritize unlocking her Bonus Traces like Overdraft, which allows her Basic ATK to count as a follow-up attack. This ensures she remains a fully integrated part of your follow-up engine even when playing SP-efficiently.

Topaz & Numby Best Light Cones

To select the ideal Light Cone for Topaz & Numby, evaluate your build against these three tactical needs rather than simply choosing by rarity:

  • Maximizing Follow-up Damage: The vast majority of Topaz’s damage comes from Numby’s follow-up attacks. If your build is lacking in offensive pressure, prioritize Light Cones like Worrisome, Blissful (her signature) or Swordplay. These provide massive DMG multipliers that scale specifically with her multi-hit follow-up style, ensuring Numby hits like a truck every time he’s advanced forward.

  • Balancing Critical Consistency: Topaz needs high CRIT Rate to ensure her frequent, multi-hit attacks actually land as criticals. Since her traces don't provide a massive amount of free Crit, using a Light Cone like Cruising in the Stellar Sea (from Herta's Store) can bridge that gap. This is especially useful for reaching the 50% CRIT Rate threshold required for the Inert Salsotto relic set bonus.

  • Amplifying Team-Wide Offense: Unlike traditional Hunt carries, Topaz often functions as a "Sub-DPS" or "Follow-up Enabler." If you are running her alongside characters like Dr. Ratio, Aventurine, or Ashveil, prioritize Light Cones that offer team-wide utility. Her signature cone, for example, applies the Tame debuff, which increases the CRIT DMG all allies deal to that target, turning Topaz into a force multiplier for the entire squad.

Recommended Light Cone

Light_Cone_Worrisome%2C_Blissful

Worrisome, Blissful (5★)

  • ATK: 582 | DEF: 463 | HP: 1058
  • Skill (S1): Increase the wearer's CRIT Rate by 18% and their follow-up attacks' DMG by 30%. After the wearer uses a follow-up attack, apply the Tame state to the target, stacking up to 2 stacks. When allies hit enemy targets under the Tame state, every Tame stack increases the CRIT DMG dealt by 12%.

Light_Cone_Swordplay

Swordplay (4★)

  • ATK: 423 | DEF: 330 | HP: 1058
  • Skill (S5): For each time the wearer hits the same target, DMG dealt increases by 16%, stacking up to 5 time(s). This effect will be dispelled when the wearer changes targets.

Light_Cone_Cruising_in_the_Stellar_Sea

Cruising in the Stellar Sea (5★)

  • ATK: 476 | DEF: 330 | HP: 952
  • Skill (S5): Increases the wearer's CRIT rate by 16%, and increases their CRIT rate against enemies with HP less than or equal to 50% by an extra 16%. When the wearer defeats an enemy, their ATK is increased by 40% for 2 turn(s).

Light_Cone_Only_Silence_Remains

Only Silence Remains (4★)

  • ATK: 423 | DEF: 330 | HP: 1058
  • Skill (S5): Increases ATK of its wearer by 32%. If there are 2 or fewer enemies on the field, increases wearer's CRIT Rate by 24%.

Light_Cone_Final_Victor

Final Victor (4★)

  • ATK: 423 | DEF: 330 | HP: 1058
  • Skill (S5): Increases the wearer's ATK by 20%. When the wearer lands a CRIT hit on enemies, they will gain a stack of Good Fortune. This effect can be stacked 4 time(s). Every stack of Good Fortune the wearer has will increase their CRIT DMG by 12%. Good Fortune will be removed at the end of the wearer's turn.

Topaz & Numby Relics, Ornaments & Stats Priority

1. Relics

The 4-piece The Ashblazing Grand Duke set stands as the absolute best choice for Topaz, as it is specifically designed for multi-hit follow-up attackers, providing a stacking ATK buff that Numby can max out almost instantly. If you are looking for a high-damage alternative in debuff-heavy teams, the 4-piece Pioneer Diver of Dead Waters is a powerful second-best option, leveraging Topaz's "Proof of Debt" status to significantly boost her CRIT stats and overall DMG. Finally, for a more accessible and flexible build, a 2-piece hybrid of Musketeer of Wild Wheat and The Ashblazing Grand Duke is a reliable third choice, offering a consistent balance of raw ATK and follow-up damage that works well in any team composition.

Recommended Relics 
1st

Item_The_Ashblazing_Grand_Duke

The Ashblazing Grand Duke

  • 2-Pc: Increases the DMG dealt by follow-up attacks by 20%.
  • 4-Pc: When the wearer uses follow-up attacks, increases the wearer's ATK by 6% for every time the follow-up attack deals DMG. This effect can stack up to 8 time(s) and lasts for 3 turn(s). This effect is removed the next time the wearer uses a follow-up attack.
2nd

Item_Pioneer_Diver_of_Dead_Waters

Pioneer Diver of Dead Waters

  • 2-Pc: Increases DMG dealt to enemies with debuff by 12%.
  • 4-Pc: Increases CRIT Rate by 4%. The wearer deals 8%/12% increased CRIT DMG to enemies with at least 2/3 debuffs. After the wearer inflicts a debuff on enemy targets, the aforementioned effects increase by 100%, lasting for 1 turn.
3rd

Item_Musketeer_of_Wild_Wheat

Musketeer of Wild Wheat

  • 2-Pc: ATK increases by 12%.

Item_The_Ashblazing_Grand_Duke

The Ashblazing Grand Duke

  • 2-Pc: Increases the DMG dealt by follow-up attacks by 20%.

2. Planar Ornaments

The 2-piece Duran, Dynasty of Running Wolves set stands as the absolute best-in-slot choice for Topaz, providing a massive ramp-up in damage that is incredibly easy to stack since she is almost always paired with other follow-up (FUA) characters. For those seeking pure offensive ceiling, The Wondrous BananAmusement Park is a powerful alternative that specifically rewards her for having Numby (her summon) on the field, though it requires stronger substat rolls to make up for its lack of built-in CRIT Rate. If you are running a dual-Hunt composition with characters like Dr. Ratio or Feixiao, the 2-piece Izumo Gensei and Takama Divine Realm becomes an elite option by providing a flat CRIT Rate boost that simplifies your build requirements. Finally, the 2-piece Inert Salsotto remains a highly consistent "old reliable" choice, offering a permanent boost to her follow-up and Ultimate damage that works well in any scenario

Recommended Planar Ornaments

Item_Duran%2C_Dynasty_of_Running_Wolves

Duran, Dynasty of Running Wolves

  • 2-Pc: When an ally uses follow-up attacks, the wearer gains 1 stack of Merit, stacking up to 5 time(s). Each stack of Merit increases the DMG dealt by the wearer's follow-up attacks by 5%. When there are 5 stacks, additionally increases the wearer's CRIT DMG by 25%.

Item_The_Wondrous_BananAmusement_Park

The Wondrous BananAmusement Park

  • 2-Pc: Increases the wearer's CRIT DMG by 16%. When a target summoned by the wearer is on the field, CRIT DMG additionally increases by 32%.

Item_Izumo_Gensei_and_Takama_Divine_Realm

Izumo Gensei and Takama Divine Realm

  • 2-Pc: Increases the wearer's ATK by 12%. When entering battle, if at least one other ally follows the same Path as the wearer, then the wearer's CRIT Rate increases by 12%.

Item_Inert_Salsotto

Inert Salsotto

  • 2-Pc: Increases the wearer's CRIT Rate by 8%. When the wearer's current CRIT Rate reaches 50% or higher, the wearer's Ultimate and follow-up attack DMG increases by 15%.

3. Stats Priority

Main Stats
BodyCRIT Rate / CRIT DMG
FeetATK% / SPD
Planar SphereFire DMG Boost
Link RopeATK%
Sub-Stats Priority

CRIT Rate / CRIT DMG > ATK% > SPD

Topaz & Numby Best Teams

If you want to use Topaz & Numby as a sub-DPS or follow-up enabler who does more than just deal single-target damage, she's an absolute game-changer. She perfectly fits aggressive, Follow-Up Attack teams by consistently applying the Proof of Debt debuff and amplifying the follow-up damage received by enemies. Her Talent acts as a huge off-turn damage engine and offensive steroid for attack-reliant setups like Dual-DPS or Follow-Up Hypercarry. Even outside those specific teams, her skill-point efficiency and automatic action-bar advancement make her an incredibly comfortable, offensive-minded pick for any lineup.

Main DPSSub-DPS/EnablerSupportSustain

Feixiao

Feixiao (5★)

Topaz & Numby

Topaz & Numby (5★)

Robin

Robin (5★)

Aventurine

Aventurine (5★)

Ashveil

Ashveil (5★)

Topaz & Numby

Topaz & Numby (5★)

Robin

Robin (5★)

Aventurine

Aventurine (5★)

Ashveil

Ashveil (5★)

Topaz & Numby

Topaz & Numby (5★)

Sunday

Sunday (5★)

DHPT

DHPT (5★)

Feixiao

Feixiao (5★)

Topaz & Numby

Topaz & Numby (5★)

Cipher

Cipher (5★)

Aventurine

Aventurine (5★)

Dr. Ratio

Dr. Ratio (5★)

Topaz & Numby

Topaz & Numby (5★)

Robin

Robin (5★)

Aventurine

Aventurine (5★)

Yunli

Yunli (5★)

Topaz & Numby

Topaz & Numby (5★)

Sparkle

Sparkle (5★)

Huohuo

Huohuo (5★)

Jade

Himeko (5★)

Topaz & Numby

Topaz & Numby (5★)

Tribbie

Tribbie (5★)

Lingsha

Lingsha (5★)

Jade

Jade (5★)

Topaz & Numby

Topaz & Numby (5★)

Robin

Robin (5★)

Aventurine

Aventurine (5★)

Dr. Ratio

Dr. Ratio (5★)

Topaz & Numby

Topaz & Numby (5★)

Pela

Pela (4★)

Gallagher

Gallagher (4★)

March 7th (Hunt)

March 7th (Hunt) (4★)

Topaz & Numby

Topaz & Numby (5★)

Asta

Asta (4★)

Lynx

Lynx (4★)

Topaz & Numby Eidolons

Eidolon Performance

Eidolon RatingExplanation
E1★★★★★Future Market. Enemies with Proof of Debt enter the "Debtor" state. Follow-up attacks against Debtors have their CRIT DMG increased by 25%, stacking up to 2 times (50% total).
E2★★★★☆Bona Fide Acquisition. After Numby takes action and launches an attack, Topaz regenerates 5 Energy. This significantly smooths out her Ultimate rotation.
E4★★★★☆Agile Asset. After Numby's turn begins, Topaz's Action is Advanced Forward by 20%, allowing her to act more frequently alongside her pet.
E6★★★★★Incentive Mechanism. Numby's attack count during the Windfall state increases by 1, and its Fire RES PEN increases by 10% during its attacks, maximizing burst potential.

Eidolon Effect

EidolonEffect

e1

E1

''Future Market''

When enemies afflicted with Proof of Debt receive follow-up attacks, they will enter the Debtor state. This can take effect only once within a single attack.The Debtor state increases the CRIT DMG of follow-up attacks inflicted on the target enemies by 25%, stacking up to 2 time(s). When Proof of Debt is removed, the Debtor state is also removed.

e2

E2

''Bona Fide Acquisition''

After Numby takes action and launches an attack, Topaz regenerates 5 energy.

e3

E3

''Seize the Big and Free the Small''

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

e4

E4

''Agile Operation''

After Numby's turn begins, Topaz's action is Advanced Forward by 20%.

e5

E5

''Inflationary Demand''

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

e6

E6

''Incentive Mechanism''

Numby's attack count during Windfall Bonanza! state increases by 1, and its Fire RES PEN increases by 10% when it attacks.

Conclusion

Topaz & Numby are far more than just single-target damage dealers; they are a meta-defining duo that truly finds their stride in Follow-Up Attack and highly synergistic compositions. Their kit is built around the Proof of Debt mechanic and the relentless strikes of Numby, which essentially allow them to continuously launch off-turn attacks and increase the follow-up damage enemies receive while acting as a massive offensive enabler for the team. By focusing on their CRIT Rate, CRIT DMG, and ATK% stats, you ensure Numby’s frequent assaults stay potent while keeping their Ultimate charge ready to accelerate your squad's damage cycles exactly when the team needs it most.

In the heat of endgame content, Topaz & Numby stand out because they provide a unique supportive utility that traditional Hunt characters cannot match, amping up the squad's overall damage potential by providing continuous follow-up vulnerability and specialized buffs for your heavy hitters. To take your Topaz & Numby to the next level and strengthen your team, consider topping up Honkai: Star Rail through LootBar. Their platform offers a safe and convenient way to get the Oneiric Shards you need for Characters or Eidolons at significantly lower prices. Don't miss out on maximizing your account's potential; head over to LootBar and prepare your squad for the toughest challenges!