Nicholai Ginovaef (Resident Evil 3: Nemesis)

Image of Nicholai Ginovaef
Originally from Moscow, Russia, who is now a commander of the U.B.S.C. Delta Platoon assigned to clean up Raccoon City. However Nicholai's has also been given some specific secret instructions to carry out, including gathering battle data and the medical for the B.O.W.s under development, which is essentially Umbrella's true aim.

Every encounter with him is a sinister one, making it obvious that Nicholai is hiding something. His true motives aren't revealed until the very end, where depending on the course of events he either succeeds with his mission, or fails miserably.
Blood typeA