William Birkin

William Birkin was a high ranking Umbrella scientist and the creator of the G-virus. He joined Umbrella with Wesker at the age of 15 in 1977, he rose up quickly to become a lead researcher. With Wesker, he was involved in James Marcus's assassination. In 1988 he married fellow researcher Annette and had a daughter named Sherry, later he was sent with Wesker and USS Delta team to investigate if the traning mansion was sutible to reopen. He discoverd that Marcus was still alive, Delta team were wiped out and Wesker went rogue, and destroyed the mansion.

In 1998 he completed the G-viurs and made plans to betray Umbrella, so they sent a USS team to retrive it. He was gunned down and the samples were retrived but he injected himself with the G-viurs to surive, he mutated into a powerfull G creature and killed nearly all the USS members. In the cross fire the T-viurs was leaked causing the Raccoon City outbreak. Two survivors of the outbreak fount out what had happened and fought him, causing him to mutate more. In a rage he killed his wife and infected his daughter, the two survivors however cured Sherry and badly injured him many times, despite the power he had. When they escaped he tried to kill them, now in his final mutated and most powerful form, but the lab blew up killing him. The survivors and Sherry escaped.