Coltrane

Coltrane (voiced by Corbin Bleu) is a friend of Jeremy Johnson, and the guitarist in his band, Jeremy and the Incidentals. He was first seen when he, along with Jeremy and the band's unnamed drummer, performed at the Summer Festival, during which they were briefly transformed into a punk rock version of themselves by Dr. Doofenshmirtz's Ugly-inator. ("The Best Lazy Day Ever")

Coltrane was later seen watching the Jeremy's TV commercial with him, and then changed the channel to see Candace Flynn on 's game show. ("Let's Take a Quiz")

Coltrane may apparently be a love interest to Stacy Hirano. During the end credits of "The Best Lazy Day Ever", while performing "Our Do-Nothing Day", they can be seen smiling at each other in a way very similar to how Candace and Jeremy are smiling at each other in the same scene.