Now, I realize that, whatever the OP says, this thread isn't really for characters you hate. Some people might take it that way, but most will probably just conflate "annoyance" with "hatred." In fact, that's been the general attitude so far.
I'm not doing that.
As I say in each of these threads, they're both from A Drug That Makes You Dream.
I distrusted Kyoka almost immediately, for her attitude and the implications that she bullies a girl I was rather taken with. I disliked her boyfriend Gaito from the instant I heard of his reputation as a bully and possible rapist, and he terrified me during his first on-screen appearance, when his overall demeanor gave every credence to the rumors. That was just at the beginning of the game.
By the end of the game, though, I didn't just want them to die. I wanted to kill them personally. Not in the game, mind you; I wanted to strangle or stab them myself. I wanted to bite their throats and drink their blood. They scared me so badly that I wanted those two hell-beasts in human form to suffer, every bit as much as they made me and Aeka suffer.
By the end of the game,
I wanted to repay them in blood.
And strangely enough...I'm not really exaggerating. I don't think I'd ever been, or have yet to be, as enraged as I was during the "Aeka: Fight Against Reality" scene.