Dahlia Black - One of their longest and closest friends up topside, at least until Dahlia found out they were reporting on her activities to her mother. They have been rebuilding their friendship, and while it's not the same, they have grown close again.
Chloe Black - Sareth's de facto queen and mentor, the reason they were able to reach earth in the first place. The closest thing Sareth has to a mother figure, though they'd rather die than admit it.
Malicia Satanopheles - Childhood friend from their days in hell. Basically had to drag Sareth kicking and screaming into trying to be a better person. Things got weird since she turned into an angel but it hasn't changed how much they care for her.
Laurie Palazzo - Mal's human host while she was still a demon. Spent a great deal of time mutually jealous over the other's close relationship to Mal. Currently have
some kind of relationship going on. It's messy.
Sylvi Thorsblood - Mal's friend. Despite being basically the opposite in every way the two of them are somehow on speaking terms.
Sebastian Roldan - Dahlia's former bodyguard. They have a relationship defined by mutual antagonism. Sareth isn't going to
say anything nice to him, though whether they
feel anything nice for him is another matter.