Mutations
| Variant | Exist Count | |
|---|---|---|
| Normal | — | — |
| Gold | — | — |
| Diamond | — | — |
| Rainbow | — | — |
| Radioactive | — | — |
| Yin Yang | — | — |
| Candy | — | — |
| Galaxy | — | — |
| Lava | — | — |
| Bloodrot | — | — |
| Cursed | — | — |
| Cyber | — | — |
| Divine | — | — |
Trivia
Sigma Girl was one of the brainrots to be readded in the Brainrot Trader, the other one being Mangolini Parrocini, Squalanana, Piccionetta Machina, Anpali Babel, and Belula Beluga. She was added in Brainrot Trader during Admin Abuse.
Sigma Girl FAQ
Is Sigma Girl rare?
Sigma Girl is a Legendary tier item, making it one of the rarer Brainrots in the game. Community trading data shows an average value of around 1,800 coins.
What is the best mutation for Sigma Girl?
Sigma Girl has 12 known mutation(s). Check the Variants table above for exist counts per mutation to identify the rarest option.
Is Sigma Girl worth trading for?
Sigma Girl is Legendary tier and typically holds strong trade value, especially for mutated variants. Community trading data shows an average value of around 1,800 coins.
About Sigma Girl
Sigma Girl is a Legendary brainrot that was released around 9/20/25. It costs and has a base income of . Sigma Girl looks similar to Sigma Boy, except she is pink instead of black and has pink outlined eyes. The Salmon Nigiri on its head is in the shape of a bowtie.
Sigma Girl is a legendary-tier brainrot in Steal a Brainrot, the Roblox collection-and-trading game where every pet generates passive income and can be upgraded with mutations and traits. At base, Sigma Girl earns $1.8K/s and costs $340.0K from the in-game shop — those numbers are the floor, before any multiplier from mutations or trait stacking is applied.
This brainrot was first added in Update 17. It is obtained via Getting from the Craft Machine in-game. Verify availability before any trade — Steal a Brainrot regularly cycles which items are obtainable, and a brainrot's market value can swing sharply when the game flips it to limited or unobtainable status.
Rarity and Value Signals
- Sigma Girl is listed as Legendary rarity in Steal a Brainrot.
Best Mutations and Traits
- This page tracks 12 mutation option(s) for Sigma Girl.
Should You Trade for Sigma Girl?
- Sigma Girl trade interest depends on its Legendary rarity, current supply, demand, and variant data.
Availability and Trade Notes
- No confirmed acquisition method is stored yet, so this page avoids guessing how to obtain Sigma Girl.
- Legendary rarity is one of the main signals to check before judging whether Sigma Girl is common, collectible, or trade-sensitive.
- Mutation data is available, so compare variant supply instead of judging only the base item.
- rot.rocks currently records demand NORMAL and trend STABLE for this item.
- The base income signal is 1800, which can matter when players compare collecting value against trading value.