I can only say I dislike a character, not hate them, because for some reason this is one of the few times I don't really hate a character.
1. Trad - he was constantly negative, and not in the "comic relief" sort of way. And he did always blame Valt, while turning a blind eye to Stan.
2. Joshua - just the spoiled celebrity who gets mad when things don't go the way he wants them to, and is not above using his celebrity status to get what he wants. I was actually glad when he seemed to mature from the spoiled big shot in order to beat Free...but then that all became null and void when he caught Free off guard (you caught him off guard, big deal. Don't champions have a backup for little setbacks?) and felt a little sadistic glee when I saw his face when Free casually beats him.
3. Aiga - I just disliked him for the fact he was a bit too OP at the start for my tastes (he went toe to toe with Valt, the freaking WORLD CHAMPION. Even though one can argue Valt was still learning to master Winning Valkyrie, Aiga was still a rookie. Valt should've mopped the floor with him), and the fact that he was a jerk towards other people. But he did earn my respect when his character changed and stuff, and he kinda grew on me, so he's cool in my book now. I also felt "meh" when he destroyed Valkyrie. I just knew someone else was going to come along and kick his behind. *cough* Phi *cough*
4. Ranjiro - he just seems to be a replacement of sorts for Rantaro. I would've liked it if his character had been a little more unique, but nope. He's the dude who loses most of his battles, and only cannon fodder for training.
I'd like to make myself believe...that planet Earth....turns...slowly...