Sonic is a ten year old hedgehog who lives in Station Square. He gets super speed after tripping over a barrel of toxic waste that fused with his natural structure. He uses this speed to stop Dr. Robotnik from enslaving South Island.

The voice I have in mind for him also sounds like the voice he had in the Sega World musical (https://www.youtube.com/watch?v=fq4g6-uKVQM) as well as Meg Inglima's portrayal in Sonic's Schoolhouse (but not as BAD) and of course, Jaleel White's portrayal. It helps if a female voices him, because half of the inspirations I just listed were done by women.