Dr. Green

Dr. Green, real name Anna Bolt, was a researcher who worked in the Hive. She was trapped inside a sealed room with Dr. Blue and Dr. Brown which flooded when the fire sprinklers came on. She drowned, but was shortly thereafter resurrected by the T-Virus and turned into a zombie. She attacked Spence Parks in the flooded lab, but was shot and killed by him.

Trivia
Green's real name is a reference to the actress portraying her, Anna Bolt, wife of Jeremy Bolt.