Sebastian Blake (referred to as Sean by Warren) is the newborn baby of Sienna Blake and Warren Fox, born on 7th November 2017. He has a twin sister named Sophie Blake and two half siblings: Joel Dexter from his father's side and Nico Blake from his mother's side. Warren kidnapped Sophie from the hospital and went on the run with her leaving Sebastian with his mother. Warren returned in May 2018 and took Sebastian as well.

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