It's interesting how varied people's opinion of the characters are. I suppose that means Selebus is good at making them each developed enough that it largely comes down to our own inclinations rather than some clearly having less effort put in.Finally finished the game up to present. Once you get past the cringe edgelord nihilism, the characters are absolutely wonderful.
S Tier: Maya, Rin, Yumi
A Tier: Ayane, Kirin, Noriko, Sana
B Tier: Ami, Chika, Io, Makoto, Miku
C Tier: Futuba, Molly, Nodoka, Touka, Tsuneyo, Uta
D Tier: Otoha, Yasu
I myself would rank them at:
S: Makoto, Ayane, Futaba
A: Yumi, Chika, Noriko, Ami
B: Maya, Rin, Molly, Tsuneyo
C: Sana, Otoha, Uta, Touka, Miku
D: Io, Yasu, Nodoka
F: Kirin