Leviathan (Envy)

Leviathan (Envy) is one of the main characters from Seven Mortal Sins. She is lesbian because she becomes instantly infatuated with Lucifer upon the latter's arrival in Hell and makes herself into the fallen angel's sidekick. She is therefore continuously jealous of Maria because she receives the better part of Lucifer's attention, though the two are quite capable of working together if it serves Lucifer's interests.