Joe is a balloon that is somehow alive. Since he is a balloon, he doesn't have a body - Just a head of sorts and a string that is basically his arm. He is rather nervous but very smart. He says random facts whenever there is awkward silence. He is funny and weird. He is scared of flying away so he wraps his string around the person's arm who is holding him. He doesn't like to deflate, but sometimes it happens so someone has to put air back into him, which makes him feel strange and he blushes.