Arya is an Exorcist angel who goes down to hell for Exterminations that happen every once a year (which is a mass genocide of sinners to reduce overpopulation in hell), she is Lieutenant of the Exorcists with Cartman being her commander Even though she seems to be serious and mean she can also be sadistic while murdering sinners. She is very loyal to heaven and Cartman (also just HAS to be nice to him). Also she hates Kyle, her ex best friend in hell.

(she also refers to Cartman as "Sir")