are there any anime characters like him?

[Itachi75]

are there any anime characters that are like harima kenji?
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because when i watched school rumble i considered him one of the most unique characters in anime, its weird to see such a cool guy turn into such a bumbling fool and not be a douchebag about things. he is very interesting.
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so any of you know of anyone like him?

 

[cigi]

Ya i have kanta mizuno from desert punk he went from being the good hero guy(main character) to the evil guy, his side kick became the main character afterwards