Firefly

Description
As Firefly:

A 5-inch tall heroine in a fitted black bodysuit with yellow and red accents along the armored sections. She has a fully sealed metal helmet with a yellow-tinted visor to see through. The visor reveals her eyes, but the light within the helmet along with the tint wash out fine details of her features. The armor's hard plating mimics heroic musculature, while the suit remains flexible enough for a full range of movement.

As Sun-hee:

A slender, lithe young korean woman with short brown hair, standing at 5'2". She's wearing black skinny jeans, a white boyfriend tee in a french tuck, and black slip-on casual sneakers with white soles. Her face is heart-shaped with a small chin, pink lips, and bronze colored eyeshadow smoked out over her lids. Her skin is pale and smooth. (+1d6 Striking Appearance)

Powers
An accident left Sun-hee's molecular structure changed, and gave her molecular/matter manipulation. The first reaction she created was a nuclear fusion reaction that destroyed the labs. Not bad for someone who isn't a physicist and has no idea how her powers work. Only it wasn't under her control. She's learned a little control, mostly on instinct and fear trying to escape and hide. She can excite molecules to generate fire, or merge nuclei to create fusion reactions. Her molecular structure can shrink down, and she can even expand that to make other things small.