Name a character wewe consider a dirty coward. link
I consider Aria from Akame Ga Kill! to be one.
If wewe don't get why I consider her such a coward, watch the part when Akame targets her, and the part where Leone grabs her kwa the hair to halt her escape a sekunde time each after seeing what Aria and her family has done.
Shinji Matou from Fate/Zero. Not only is he a sadistic ass**** who rapes his sister and calls her a whore due to this, he is a bigger p**** than Shinji from Evangelion, and will let others die just so he can save himself. I REALLY hate this guy, in case it wasn't obvious enough