Bobby Brooklyn Mateo Costello was born in the Dungeons, when his mother was trapped by his great-grandfather, Silas. He is delivered by his father, Riley. When Mercedes struggles to look after him, Bobby is sent to live with his father and uncle, Seth in Leeds. When Riley returns with Bobby, he is reunited with his family.
Bobby Costello is portrayed by Jayden Fox
- 2018-: Bobby sings karaoke with Sally and Nana McQueen.