Mature Horror Manga Characters
Since there's actually a lack of profiles for characters from these types of manga here on CV, I thought I'd do Honorable Mentions:
Akira Inugami from Wolf Guy.
Akumetsu from Akumetsu.
Kenji Fujikido from Ninja Slayer.
God...I can't really think of anyone else. Otherwise, they'd be up here. Shout out to Hideo from I Am A Hero.
There NEEDS to be more hardcore horror manga. I guess that'd be up to Americans who know how to draw in that style. It's all 'cause girls with big boobs and teenagers with fox ears sell more, I guess.