Since most of us know the anime characters, we can make pretty accurate setup speculation. Why aren't we doing this already?
Furude Rika
Sonozaki Mion
Sonozaki Shion
Ryuuguu Rena
Hojou Satoko
Maebara Keiichi^These characters are for sure in the game and they should be all town aligned (6/12)
Irie Kyousuke
Ooishi Kuraudo^These two should be in the game, town-aligned, and their powers should be respectively doctor-like and cop-like (8/12)
Takano Miyo
Tomitake Jirou^These two should be in the game too and they should be scum (Takano Miyo could be something like a godfather with some huge powers) (10/12)
2 more spots, i think there must be 1 more Oyashiro supporter, to be honest it could be Irie Kyousuke too.
Remaining characters are taken among these ones (I'll order from the most to the least probable):
Sonozaki Oryou there could be a "Sonozaki Family" faction too, i think we shouldn't understimate this.
Chie Rumiko town-aligned, she's the teacher so idk what role couild it be
Akasaka Mamoru town-aligned, cop-like
Kasai Tatsuyoshi town-aligned (or Sonozaki-aligned), bodyguard-like
Hojou Teppei third party, he could be a lyncher with the objective to lynch Hojou Satoko
Mamiya Rina third party, she and Hojou Teppei could be lovers
Sonozaki Akane if there's "Sonozaki Family" faction, she's in
Hojou Satoshi useless but would be town-aligned
We must consider this too: there could be characters that change their alignment when they increase Hinamizawa Syndrome level (HS)
Oh and regarding this
5.4) The mafia do not get a standard mafia kill. Instead, they have the ability to increase the HS level of multiple people.
I think that ending D1 without lynch could be a very good choice
