It was his long time partner Joseph Oda, who in an attempt to get Sebastian back on track and save him from himself, reported Sebastian to Internal Affairs. Slowly his passion for his work eroded, as well as his sense of perspective and composure, as he further spiraled into despair. Feeling powerless and dejected, Sebastian took to drinking his sorrows away. His career was on the fast track until dual tragedies derailed his path. Sebastian Castellanos is a decorated detective of the Krimson City Police Department. He is a detective of Krimson City Police Department along with his partners Juli Kidman and Joseph Oda.
Senior Detective Sebastian Castellanos is the main protagonist of the 2014 survival horror game The Evil Within and its 2017 sequel The Evil Within 2, and also the deuteragonist of The Evil Within: The Assignment and The Evil Within: The Consequence.