the only true canon features of him are that he is white and he has blonde hair (please dont take that the wrong way, i don't want any misunderstandings. that's just how he looks). heres some more info if you're curious:
Mitchell Dawson is a 17 year old high-school junior and an aspiring musician. Born and raised in Missoula, Montana, he attends Ted Williams High School (made-up). Mitchell is a quiet but extraordinary young man, possessing incredible musical talent and intelligence. He, along with his friends Amy, Britney, and Derek, founded the P-51's, a student rock band that does shows in the Missoula area. Mitchell is of Italian-Norwegian descent, and plays violin, guitar, piano, and is learning the cello. He likes to hike, watch movies, learn, and advocate for his school's orchestra.