Cross Sans is a shy, closed off skeleton. He's 29, his nickname is "Oreo" and his best friend is Epic Sans. He fights with swords and stays in an AU called XTale, and he's scared of cows. XGaster kept overwiting their AU, killing them and making them depressed - so Cross thought that if he killed them all and took their souls (except Gaster and Alphys), he could overwrite. His monster body wasn't able to, so they all stayed dead. He and XChara now share a body due to their souls being merged.