6/10 only because of Shogo, he was the best and most realistic character in the entire series. He made this series worthwhile.
Shuuya and Norkio lived due to Shojo saving their asses every time Shuuya decided to act all high and mighty. I felt bad for Mimura and Yutaka dying, they should have lived instead of Shuuya and Norkio. Shuuya annoyed the hell out of me, with his self-righteous attitude and all did was cry throughout the series. Oh yeah, Kiriyama was such a fail character, slicing fingers with bare-hands, surviving explosions without a scratch, getting up and shooting after getting shot in the head, teleporting, beating a professional judo trainer after reading a book about judo, and other stupid shit.