Ms Stern (Naomi Snieckus) is Heaven's uber strict bureaucrat who likes to follow and enforce the rules. She will not let a human and an AIT date.
In "I Kinda Always Knew I'd Be Your Lex-Boyfriend" when she finds out that Carl and Denise are dating she forbids it and puts a spell on them to make sure they don't continue dating. The spell starts to turn their skin gradually blue when they start thinking romantic thoughts about the other. She was sent down to Earth for Carl and Denise but took Lexinstead because he was doing an insulting immitation of her which is a far greater crime.  Characters.
Her nickname at Angle school was Mildew Stinks and is also a Angel inspector. She has a talent for cards.