For personal curiosity's sake and for future archiving. A collection of the canon names of each personality and a VNDB link for their seiyuu.

Muku: 聖道 まりあ Seido Maria
Tsundere: 久遠寺 薫 Kuonji Kaoru
https://vndb.org/s267

Majime: 氷室 真冬 Himuro Mafuyu
Oneechan: 美波 Minami
https://vndb.org/s284

Rindere: 滝沢 リサ Takizawa Lisa
Junshin: 仲野 このみ Nakano Konomi
https://vndb.org/s278

Secretary Maid: 蒼井 葉 Aoi Yo
Sadist: 猪狩 いたみ Igari Itami
CM3D2 Secretary Maid: No name given
https://vndb.org/s518

Bookworm: 雪野 弥子 Yukino Yako
https://vndb.org/s4602

Koakuma: 小山 咲 Koyama Saki
https://vndb.org/s601

Oshitoyaka: 深山 祥子 Miyama Shoko
https://vndb.org/s939

Fuwafuwa Imouto: 花音 Kanon
https://vndb.org/s999

Buwaisou: 結羽 Yuiha
https://vndb.org/s15236

Ojousama: 鞠弥 Mariya
https://vndb.org/s2581

Osananajimi: 碧 Midori
https://vndb.org/s1975

Kisaku: 来栖 リズ Kurusu Rizu
https://vndb.org/s281

Shukujo: 茅野 レイ Kayano Rei
https://vndb.org/s1549

Masochist: 東峰 仁花 Toumine Hitoka
https://vndb.org/s18694

Haraguro: 古賀 深雪 Koga Miyuki
https://vndb.org/s5762

Gyaru: きらら Kirara
https://vndb.org/s5006

Kuudere: 五十鈴 月夜 Isuzu Tsukiyo
https://vndb.org/s646

Yandere: 紅葉 Momiji
https://vndb.org/s859

Bokukko: 来栖 琴音 Kurusu Kotone
https://vndb.org/s925

如月 エマ Kisaragi Ema
https://vndb.org/s879

Kinda funny to see how pretty much half of the CM3D2 cast double booked a role later in COM3D2.