Hijiri Minowa

A wealthy girl in glasses who dreams of becoming a rebel and delinquent, but her kind nature usually leads her to do otherwise. Prior to turning sixteen and becoming old enough to ride a bike, she rides in a sidecar alongside her butler, Hayakawa. After turning sixteen, she obtains a moped license and rides a Honda Super Cub outfitted with a cattle skull and training wheels, until she properly learns to ride and switches to a customized Ducati 1199 Panigale S, tuned down to attend the Japanese regulations that ban minors from riding bikes with displacements bigger than 400 cc.

(Source: Wikipedia)