Creeper

Creeper is a mob and a main character of the series, who is Steve's best friend. After been exiled by the other creepers for his friendly nature, Creeper goes out on his own to find himself.

Instead he finds Steve and tries his very best to befriend him. Steve is hesitant at first because of Creeper's explosive nature, though over time he will realize that Creeper isn't so bad and is just trying to help.