Sonia the Hedgehog is an anthropomorphic hedgehog and the youngest triplet sister of Sonic and Manic the Hedgehog, as well as the daughter of Queen Aleena. She is also a member of the Sonic Underground. She is a caring sister, athletic and the pianist of the band. She has a slim, curvy figure, bright fuchsia fur, pink hair in a style of straight spikes and full fringes, peach skin, and black eyes like her siblings. She is physically the strongest of her siblings and was raised in luxury/wealth.