I'm late on this @RosePark but I tried lol.
And the winner is?..... (drum roll please)
Kamui from the series Gintama! Ｏ(≧▽≦)Ｏ
Upon first glance he looks like a harmless little kid who loves to eat and is full of smiles and sunshine! .....that is until u annoy him or get on his bad side .....
and he rips your heart out with his bare hands.
All with a smile on his face of course!
He has no respect for those weaker than himself and loves to kill, kill, KILL!! One of Kamui's attacks alone is absolutely lethal. His incredible physical skills makes it extremely hard to dodge or block his attacks.
He's got a crude sense of humor and the laid back arrogant attitude to back it up! He's a win win in my book! ヾ(@^▽^@)ノ
Well that's all folks! Come on now, wave goodbye to the nice man. (｡´∀｀)ﾉ