I think I might edit Stella's bio and personality to make her a Hufflepuff. I'd waffled between Hufflepuff or Ravenclaw for her initially, but when I misread Calvin's sheet and thought he was Gryffindor, it made more sense to me that there be someone else who's a Slytherin to keep both Zef and Stella from being like... the "outsiders." However, I realize now that if Stella remains a Slytherin, then that only leaves Calvin without a housemate friend in the group which could work but just seems a little unbalanced. Besides, I'd love to make it so that there's the full "set" of houses in the group.