Talk:Kishou Arima/@comment-68.231.181.57-20150725063215/@comment-25047329-20150725161407

^A sadist is someone who enjoys infecting pain on others, often deriving some sexual satisfaction from it. We know Kaneki enough to know that he doesn't take away any real pleasure from hurting others, what he did to Ayato was out of "revenge".

Arima gets labeled as a sadist because in his fight with Kaneki he exerted an unnecessary amount of pain, even knowing who Kaneki was and having nothing personal against him.

The circumstances between the Kaneki and Ayato fight and the Kaneki and Arima fight were different.