An ex-employee of Umbrella, Birkin hopes to keep the secrets of his newly discovered G-virus a secret from his former employers and will do whatever it takes to keep it from them. Even if it means working with some treacherous allies.

He's as neurotic as he is conniving. Birkin is a man willing to make the ultimate sacrifice for his obsession to keep the G-virus out of anyone's hands but his own. Think of a slightly more evil version of Herbert West from Re-Animator.