You'll have to kill the cook before it can cause harm to the few remaining humans alive on the station. ... Completing the side quest to kill the cook is a necessity if you're looking to get certain endings.

Where does the imposter cook go prey?

Find the Imposter on the Talos I Bridge

Entering the Talos I Bridge, keep to the left to take a grav shaft down to the Escape Pod Bay, look for a lit up pod on the far left to find the imposter cook and former volunteer, severely wounded and strapped in.

Who is the imposter cook prey?

Prey (2017)

Golubkin is first encountered in the Crew Quarters, where he masquerades as the station's chef, Will Mitchell.