Dad is a character created by Melanie Martinez for her debut album, Cry Baby. He was played by Mughen Nakamura in Dollhouse, however it is unknown if he reprised his role for Sippy Cup or not.
Life
Dad first appears in Dollhouse, where he is cheating on Mom with a slut. In the song Sippy Cup, Cry Baby's Mom discovers that he is coming home with his mistress again so she murders both of them.