An Angel who appears as a homeless girl about Angela's age. She sings and plays guitar. In her human life she froze to death. It is possible she is something of a lost soul (homeless) and only becomes an angel after "earning wings" while helping Angela and Patty during the events of So-Called Angels.
Her name is credited simply as "Angel" but on the imdb.com "Trivia" section for this episode her name is given as "Joy". (It is possible that Joy was her human name)