Ozzy is an adventurous white blood cell; who is an officer; who keeps his host, Frank DeTorre from deadly viruses. However, Ozzy does not follow rules and orders as he tends to do things his own way. Despite Ozzy's rebellious and reckless behavior, he is otherwise caring, friendly and forgiving. While Ozzy is a bit of narcissist and has an ego, he does not let them harden his heart, especially the teasing he gets from his fellow cops or anyone who belittles him. Ozzy is very humorous.