Devlin Levin

Devlin Levin Tennyson is Kevin's son, Ken's best friend and later Ben's adoptive son. When they first met, Devlin tricked Ken into leading him to a Null Void Projector which he used to free his father.

Appearance
Devlin bears a striking resemblance to his father when he was his age. He is tall, has long black hair pulled back in a straight ponytail, dark blue eyes and pale skin. He wears a dark green short sleeved hoodie, a black shirt, black pants, black and white shoes and a bandage on his right leg.

Ability
Devlin can change from human to a mutant alien form similiar at will. His mutant form is similiar to the one his father had at his same age, a conglomerate of Ben's first 10 aliens.

Family
It was revealed that Devlin is the son of Kevin and a girl from a Saturn colony, which he probably had a short relationship with but the episode Ken 10 it non-canon and this will never happen.According to Max, he and Devin were once partners, but Devin died protecting Max from Ragnarok.

Devlin Levin Devlin Levin

Trivia

 * Apart from having the same mutant form as his father did at his age, Devlin shared many aspects with Kevin: He met Ken in the same way Ben met Kevin, after Ken went off after getting upset with Ben much like how Ben stormed off after an argument with Grandpa Max. Unlike Kevin however, Devlin geniually liked his friendship with Ken. Furthermore, in the end, he was approached with the same offer to join the team that Ben offered Kevin. Unlike his father, who turned the offer down (at least until Alien Force), Devlin gladly accepted it and joined the Tennyson family.