For people who's really love Sherry Birkin!

Sherry was born around 1986 to the Umbrella virologist William Birkin, and his research colleague and new wife, Annette, when the two were both working at the Arklay Laboratory. Due to their key participation of developing biological weapons for Umbrella, William and Annette's work schedules were very intense and busy, and as such weren't always around as Sherry grew up. Nevertheless, she loved her parents very much and enjoyed spending whatever time she had with them, with her parents feeling the same.

In 1995, William and Annette were transferred from the Arklay Laboratory to a newly constructed underground laboratory in the outskirts of Raccoon City to finish William's work on a new biological weapon called the G-Virus.