Beast master is an "ok" example. Though, I'm looking for something more along the lines of the character being regarded as "a nice person", but intollerant to injustice and the character harshly "punishes" the wrong do-er.
Kinda like shuuichi from Zero though "more obviously gentle, calm, etc". Hes "a nice person" but I'm looking for someone whos almost budda like.
Spoiler (highlight to view)
The part that is like what I'm looking for is how brutal he is. When a female classmate was sort of abducted and beaten up etc by some male classmates, shuu came in and kicked some ass.
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Feed your head.