Ketrick is a character from Strife. He is the supervisor of the reactor core within the power plant.
In this part of the game, the player is clothed in a radiation-proof acolyte uniform, both for protection within the core and for camouflage purposes. Ketrick is the first NPC to see through the player's disguise, and will set off the alarm if he is talked to, then attack the player until killed. Getting past Ketrick is essential for performing the mission of destroying the core, as he is standing in the way of the rocket launcher.