Home›Games›Honkai: Star Rail›Topaz & Numby
Topaz & Numby Honkai: Star Rail fighter artwork
Honkai: Star Rail Move & Ability Guide

Topaz & Numby moves, skills and special abilities

Move & Ability Guide

Topaz & Numby: 5-Star, Fire, The Hunt. Faction: Interastral Peace Corporation — Preservation.

24 ability entries1 Skill1 Ultimate1 Talent4 Bonus Trace9 Stat Trace1 Technique1 Basic Atk6 Eidolon

Skills

1
Difficulty Paying?
Skill

Inflicts a single target enemy with a Proof of Debt status, increasing the damage it takes from follow-up attacks by 25% . Proof of Debt only takes effect on the most recent target it is applied to. If there are no enemies inflicted with Proof of Debt on the field when an ally's turn starts or when an ally takes action, Topaz will inflict a random enemy with Proof of Debt. Numby inflicts Fire damage equal to 75% of Topaz's ATK to this target. Using this Skill to deal damage is considered as launching a follow-up attack.

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.

Ultimates

1
Turn a Profit!
Ultimate

Numby enters the Windfall Bonanza! state and its damage multiplier increases by 75% and CRIT damage increases by 12.5% . Also, when enemies with Proof of Debt are hit by an ally's Basic ATK, Skill, or Ultimate, Numby's action is Advanced Forward by 50%. Numby exits the Windfall Bonanza! state after using 2 attacks.

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.

Talent

1
Trotter Market!?
Talent

Summons Numby at the start of battle. Numby has 80 SPD by default. When taking action, Numby launches follow-up attacks on a single enemy target afflicted with Proof of Debt, dealing Fire damage equal to 75% of Topaz's ATK. When enemies afflicted with Proof of Debt receive an ally's follow-up attacks, Numby's action is Advanced Forward by 50%. The action Advance Forward effect cannot be triggered during Numby's own turn. When Topaz is downed, Numby disappears.

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.

Bonus Trace

4
Stonks Market
Bonus Trace

After Numby uses an attack while in the Windfall Bonanza! state, Topaz additionally regenerates 10 Energy.

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
Max HP increases by
Bonus Trace

maximum HP increases by 6.0%

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
Financial Turmoil
Bonus Trace

Increases Topaz and Numby's damage dealt to enemy targets with Fire Weakness by 15%.

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
Deficit...
Bonus Trace

Inflicts Fire damage equal to 50% of Topaz's ATK to a single enemy.

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.

Stat Trace

9
DMG Boost: Fire
Stat Trace

Fire damage increases by 6.4%

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
CRIT Rate Boost
Stat Trace

CRIT Rate increases by 5.3%

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
DMG Boost: Fire
Stat Trace

Fire damage increases by 4.8%

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
DMG Boost: Fire
Stat Trace

Fire damage increases by 3.2%

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
DMG Boost: Fire
Stat Trace

Fire damage increases by 4.8%

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
CRIT Rate Boost
Stat Trace

CRIT Rate increases by 4.0%

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
CRIT Rate Boost
Stat Trace

CRIT Rate increases by 2.7%

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
DMG Boost: Fire
Stat Trace

Fire damage increases by 3.2%

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
HP Boost
Stat Trace

maximum HP increases by 4.0%

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.

Technique

1
Explicit Subsidy
Technique

Summons Numby when Topaz enters the overworld. Numby will automatically search for Basic Treasures and Trotters within a set radius. Using her Technique will regenerate 60 Energy for Topaz after Numby's first attack in the next battle. If Topaz is still in the team after using her Technique and defeating overworld enemies, a small bonus amount of credits will be added to the earned credits. A maximum of 10000 bonus credits can be received per calendar day. After using her Technique and defeating enemies in Simulated Universe, additionally receive a small amount of Cosmic Fragments with a small chance to obtain 1 random Curio.

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.

Basic Atk

1
Overdraft
Basic ATK

When Topaz uses Basic ATK to deal damage, it will be considered as a follow-up attack.

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.

Eidolon

6
Future Market
Eidolon

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 action. The Debtor state increases the CRIT damage 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.

Requirements / unlock: Eidolon 1

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
Bona Fide Acquisition
Eidolon

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

Requirements / unlock: Eidolon 2

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
Seize the Big and Free the Small
Eidolon

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

Requirements / unlock: Eidolon 3

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
Agile Operation
Eidolon

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

Requirements / unlock: Eidolon 4

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
Inflationary Demand
Eidolon

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

Requirements / unlock: Eidolon 5

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
Incentive Mechanism
Eidolon

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

Requirements / unlock: Eidolon 6

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.