MC: Zaydas Gremory

Mother of Zaydas: Zatanna Zatara

Father of Zaydas: Sirzechs Lucifer

Fiancée of Zaydas: Ravel Phenex

For now, older sister / maid: Grayfia Lucifuge

Aunt of Zaydas: Rias Gremory

Queen of Rias Gremory's Peerage: Akeno Himejima

Rook of Rias Gremory's Peerage: Koneko Toujou

Knight of Rias Gremory's Peerage: Yuuto Kiba

Friend: Sona Sitri

MHA: Izuku Midoriya

Isekai Nonbiri Nouka: Hiraku Machio

DC AU Anime Crossover: Ai Hoshino

DC AU Anime Crossover: Supergirl

Bishop of Rias Gremory's Peerage: Gasper Vladi 

Well, if I forgot someone, let me know, and I'll introduce them gradually.