The Bow is very mysterious, she pops up out of nowhere to say something creepy. She can literally merge her eyes into one, is the only one on the block to enjoy cheesy B-movie violence, has no bones, and she even lives in an archetypal Old, Dark House. Nobody knows if she's truly human at all.
She and Billy were paired up to get each other gifts for Friendship Appreciation Day. She got Billy a worm, and Billy got her a bow made out of worms. Both of them loved each other's gifts. One time, they had a conflict over possession of Billy's balloon that he uses to fly with, which Audrey did not resolve.