Also characters from Harry Potter (Hermione) Although since the family already has non-human members, well...
Rwby
Gawain First option or Sigurd
Hestia's innate ability would have to be the protection of the family, she is literally the goddess of Family and home, she could restrict Freya's sight or she could make impenetrable where they live and for the harem not Hephaestus better Artemis, and some Servants
Hestia
Characters for the family, they could be Fieren as the family magician (Fern can go as a bonus) since the way to convert her would be easy, literally just offer her knowledge of other worlds and magic. Characters from Rwby, Highschool DxD, HxH, To love ru, maybe from Harry Potter or even it would be great if Rin Tohsaka, shirou Emiya and Sakura Matou joined
Cable
Nice Chapter
The Archmagi in Dc
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