SPOILERS SPOILERS SPOILERS!
I have warned you.
Out of the main 9 characters. (1 being most disliked and 9 being most liked)
1. Yuka Mochida: If you have played the game, you'd know my frustrations with this character. She's a 14 year old girl who acts like a 4 year old. She's the little sister of Satoshi and Satoshi needs to man up and tell his sister to grow up and act her age.
2. Seiko Shinohara: Yes, I hate one of the most beloved characters in the game, but the reason I don't like her is because the way she acts bothers me beyond anything else. I don't like drama queens and all and that's Seiko right there. I know being in Heavenly Host she's trying to remain positive, but it's just something that makes me frustrated.
3. Ayumi Shinozaki: She gets all involved in the occult but doesn't do her research well enough. Proves it when she didn't know Naho put the incorrect spell on her blog on purpose. It bothered me how Yoshiki asked her what would happen if it went wrong and she brushed it aside, not answering the question, and went on with it. She didn't know that she had the wrong directions, but knowing the consequences, the group knowing the consequences, is a BIG deal. Obviously, Naho and her sensei got the spell from somewhere, they weren't the first to go there.
4. Naomi Nakashima: What I don't like about her is how weak willed she is. She pukes over the slightest thing. She runs out of a room, she pukes, she falls down the stairs, she pukes. I can understand the wheezing and all of that, but her weak stomach makes me think, "Does the creator of the game think that everything like that would make a girl puke or something?" It's just all the puking and the whinyness that gets on my nerves. But I get why she lashed out at Seiko, I get why she panics, but everything else, just ugh.
5. Satoshi Mochida: I like how he hold his composure and not freak out to keep Yuka calm, acting brave and not scared even though he's terrified. The only thing I have against him is the fact that he's letting Yuka act like a 4 year old and the fact all of the girls in his group likes him.
6. Ms. Yui: A lot like Satoshi, brave even though she's terrified. The only thing about her is how she didn't stop them at the beginning when Yoshiki asked what could go wrong and Ayumi not answering the question. That's just a huge red flag. But I get it, she's still young and all.
7. Sakutaro Morishige: He's naturally the quiet and mature one of the bunch, and that's what I liked about him. He does go crazy, but that's from the school itself. I can't blame him and hate him for it.
8. Mayu: I can excuse her emotions in the beginning because she had a reason. I like how big hearted she is and I honestly have a hard time saying what I dislike about this character.
9. Yoshiki Kishinuma: My most favorite character out of the bunch. He's level headed and brings up good points. He acts way stronger than the other two guys in the group. He brought up the question that needed to be asked, even though Ayumi still didn't answer it. I feel bad how it's obvious he likes Ayumi but Ayumi brushes him aside because of Satoshi and Satoshi has obvious feelings for Naomi. It's a mess, but the poor guy keeps getting pushed aside for Satoshi who can't even tell his sister to act like a 14 year old.
Most of this list also goes for how I feel about the character, even if I can't explain why. Some may sound like they should go lower or higher on the list, but, while it seems I have more beef against Ayumi than Seiko, I prefer Ayumi over Seiko.