In the Season 5 episode "The Blaze Family," Blaze reveals the he has a family: a mother, a father (with an unknown name) and a little sister named Sparkle (who could possibly become a future main character in the series).
Stripes. Stripes is an impetuous tiger truck who's always ready for action. With a signature growl, he leaps and pounces like a cat, and he's great at jumping and climbing. He has tiger claws that help him to climb trees (or just about anything), as well as super senses, especially his sense of smell.