Kurogane's attitude is based on rage. He is normally either expression less o angry. Sometimes he is happy but normally thats only in an evil way. Honsestly i have never seen a scene where Kurogane was actually happy not in an evil way. It makes yo wonder if Kurogane actually has a cuore that isn's filled up with fai love... Also, everytime Mokana wants him to pick her up o sniggle with her he pushes her away.. i always think thats hilarious, but i feal bad for Mokana though. Also, i LOVED his face when Charon ate Fai's eye. He looked like he wanted to kill someone then shove their body down a well with a few blow torches then poor gas into it and light it on fire!!!