As far as anime characters go, Yuno Gasei from future diary is mine.

Psycho girls are freaking hot. I would give anything to be stalked by some sexy psycho killer who would fight for me no matter what and kill anybody who she deemed a threat to me.

In fact, I would love to wipe out most of humanity and repopulate it with a girl like her. We would provide the world with the perfect genes. We would create a new race of super warrior humans.

That is one of my darker fantasies haha