Jill Valentine (ジル・バレンタイン) is a Special Operations Agent (SOA) of the Bioterrorism Security Assessment Alliance, of which she is a co-founder and one of the original eleven members, making her a respected and high ranking operative of the organization. Prior to this, she was a member of S.T.A.R.S. Alpha team, Position RS (Rear Security). Before joining S.T.A.R.S., she was in the U.S. Army's Delta Force training program, where she earned extremely high grades in bomb disposal. She was brought into S.T.A.R.S. for her already well-developed fighting skills.
After joining up with S.T.A.R.S., she survived the infamous Mansion incident and the Raccoon City outbreak. She is the long time partner of Chris Redfield, and as a result of their partnership, the two are engaged in a deep relationship, and Jill does really care about Chris' life when he is in danger, she would sacrifice her life for Chris, like she did in the Spencer's state. She has devoted almost her entire adult life to stopping bio-terrorism and hated enemy, Albert Wesker.