Anvil

Aka, Alice Abrams.

Alice is a mousy little librarian who hosted the Hero Maker Ring for a few months shortly after he had a reset. At four foot six in heels, her normal form is tiny.

She asked to be a big, strong, tough hero, and the HMR delivered:

The super form he trained her on is a hardlight shell, which she can change in the fly if she needs flight or something... but she needs an understanding of the mechanics to to get powers that way. By default, it forms as an Amazonian muscle beach babe. She gains almost two feet of height (a bit over six feet tall), goes from being a brunette to a redhead, gets her hair braided (it's actually just a hardlight hologram) and a green body suit... which all explodes out from her skin, wrecking any clothes she's already wearing (also handcuffs, rope, duct tape, et cetera, whicj is the point of that step).

The HMR also left her with a magic-powered motor home, and a library of training jewelry so she can pick up other powers on her own later.