Ollie has been shown to be one of the more level-headed members of Johnny's gang (as much as that can be said at least). Often offering more practical solutions to problems such as boosting Johnny over a fence with his back (although Johnny quickly shot down such blasphemous usage of the Friendship Fusion). He also has been shown to be one of the few members of the gang to criticize Johnny, being doubtful of his claims of Max and Isaac being "mutants".
Like the other member's of the gang, Ollie is loyal to their crazed leader often helping him in his various bullying escapades.
He is good friends with the rest of the gang, often hanging out with after school. Also stacks with them to complete the "Friendship Fusion" technique.