Ishimaru is a character that has to be understood in order to understand his particular personality. I always though "My God, he's too strict!", and in fact that was the truth! XD He's addicted to rules and he loves discipline the most. He has a lot of reasons why he's like this, and when he finds out that as like all the other people in the world he can have friends, he slowly starts to change a bit, being more friendly with the others and especially with Mondo, whom he even calls a "brother". His complexes led him to become what he was, but he still had the guts to fight against his pride and tried different times to approach with the others making strange gags that were understood just from him. I particularly like this part of him, and now "Bazinga" for me is like a funny joke! XD