ALTTP posted their character rankings a while back and I figured i'd try my hand at it.
Character Rankings
1. Bandai - The best damn black character in anime, no fiction, period. He doesn't feel wasted and his design is fantastic. I really got the sense that the creators wanted him to feel like an actual person, rather than some creepy caricature to be gawked at. He had to be killed early since he would overshadow everyone else.
2. Ruruka Ando - Fantastic, nuanced character with a good voice and solid design. You can tell this character will have some amazing scenes later on.
3. Seiko Kimura - She's potentially the most tragic character in the franchise. Her expulsion caused her life to spiral out of control, and it's just sad to see her so hurt and sad. Aside from that, her transformation is incredibly cool, her design is superb and she improves every scene she's a part of.
4. Miaya Gekkogahara - Obviously this rating is tentative after the reveal, but I felt an immense amount of connection to her. She's very endearing, cute and relatable. It's unfortunate that she didn't end up being Chiaki though.
5. Ryota Mitarai - His desire to be just like Naegi is adorable and endearing, but he's also a fleshed out character on top of that. I can't help but want to root for him.
6. Chisa Yukizome - Good and realistic character. She just wants everyone to be happy, and is super understanding about everyone's feelings. Her death seriously bummed me out.
7. Kazuo Tengen - The source material implies that he's a shady guy, but he's not like that at all! He might be involved with some corruption, but he's an honorable and good man. Total badass too, his fight scene with Yu was awesome.
8. Juzo Sakakura - Juzo is a character with plenty of potential but he's horrible in execution. As someone who's had to experience The Tragedy firsthand, his rage towards the Ultimate Despair is completely warranted. Only problem is, there's pretty much 0 nuance here, so it's hard to take him seriously as a character. The anime just doesn't convey any of that hate and pain in a way that isn't basic. I just don't feel any emotion when I see him lash out against Naegi, I just get, "wow this guy's a dick vibes" and "did he just chuck a chair a kyoko." Probably the most disappointing character in the anime, but still better than the people below him.
9. Koichi Kizakura - Meh.
10. Sonosuke Izayoi - Good character, atrocious design.
11. Gozu - Awful character. His death was very shocking an unexpected though.
12. Aoi Asahina - She really should have died tbh. Only redeeming factor is how hot she is after she ditches her jacket.
13. Makoto Naegi - Ultimate Hope, more like Ultimate Dope.
14. Kyoko Kirigiri - Bad and useless now.
15. Yu Narukami - Shit character.