Roll Caskett is a 14-year-old mechanic, inventor & engineer with pale skin,, long blonde spikey hair & green eyes. Roll has been living with her grandfather, professor Barrel Caskett ever since her parents disappeared when she was very young. She hopes her parents are still alive & she can find them..

Roll wears a red oversized cap with steel plate & a red short-sleeved shirt with two white buttons, white accents & exposing her midriff. She wears red short denim shorts with a brown belt & white accents & thick red ankle-boots with a pair of brown gloves with white cuffs. Under her shirt & shorts, Roll wears a short-sleeved, short-legged black bodysuit.

Roll is a very intelligent, enthusiastic & passionate young girl, & is very sweet-natured & energetic, with a tomboyish streak.