Board Thread:General Discussion/@comment-31196611-20170810165003/@comment-32915036-20170821160912

It's really up to interpretation. We're supposed to project ourselves onto Frisk, and The Fallen Child is even more of a mystery. Some interpret Frisk as a boy, some interpret Frisk as a girl. Same with Kid, The Fallen Child and Napstablook. Though ghosts do have genders, as Mettaton is a he.