I'm not doing Persona 1 or 2 cause I don't know much about them to guess characters from those games sexualities so I'm only don't 3, 4 and 5! Might make a part 2 to this for the confidents!

Minato: Bisexual, demisexual and demiromatic
Minako: Either bisexual or pansexual
Yukari: Straight, demisexual and demiromatic
Junpei: Straight
Mitsuru: Straight and demisexual
Akihiko: Bisexual, demiromatic and demisexual
Fuuka: Idk but is asexual
Aigis: Straight and asexual
Ken: Idk
Shinjiro: Gay and demisexual
Metis: Idk
Ryoji/Pharos(I think those two are the same person): Pansexual and either demisexual or asexual
Yu: Bisexual
Yosuke: Bisexual and maybe demiromatic
Chie: Bisexual
Yukiko: Pansexual, demiromatic and demisexual
Kanji: Either polysexual or bisexual or pansexual and demisexual
Rise: Straight
Teddie: Straight
Naota: Idk but is demisexual
Adachi: Either bisexual or gay
Taro: Straight
Akira: Bisexual
Morgana: Straight
Ryuji: Bisexual
Ann: Bisexual and maybe demisexual
Yusuke: Bisexual, demisexual and demiromatic
Makoto: Idk
Futaba: Pansexual and demisexual
Haru: Idk
Akechi: Gay, demisexual and demiromatic
Sumire: Idk but is into boys
Caroline/Justine/Lavenza: Asexual and aromatic
Margaret: Straight and demisexual
Marie: Straight, demisexual and demiromatic
Theodore: Either straight or bisexual and asexual
Elizabeth: Pansexual and asexual
Igor: Asexual and aromatic