Deborah Harper (Resident Evil: Undead)

Deborah Harper is a character in ''Resident Evil: Undead. ''She was the younger sister of Helena Harper.

Background
Deborah Harper's parents died before some time she turned 20 years old, and she became a college student. She was very close to Helena and Helena saved her from an abusive relationship when she inflicted serious injured on a man by shooting him.

Resident Evil: Undead
After the incident where Helena shot Deborah's abusive boyfriend, Derek C. Simmons considered to use the two in his plot to assassinate President Adam Benford. Simmons' bodyguards had held Helena and Deborah captive underneath the Tall Oaks Church laboratory. Deborah was panicking at the situation while Helena attempted to calm her down, so Simmons had his bodyguards take her away into another room and Simmons discussed with Helena to assist him in his assassination by drawing out his personal protection.

After Helena managed to complete her objective to make a false alert which caused Adam's bodyguards to go somewhere to investigate and this eventually led them to their deaths to become Zombies, while Adam transformed into a Zombie himself. Simmons then planned to use Deborah as a test subject to an enhanced version of the T-Virus which The Family took care of and left her bound and gagged on a table after injecting it into her body.

Later, Helena joined Chris Redfield's group and discovered the captured Deborah, taking off her gag and untying her. They attempted to escape the place with an injured Deborah though she fell to her knees and began transforming in pain with Helena shocked and tearfull. Deborah, in her new mutation, had lost all herself and was instead replaced with a psychotic killer. At the end, Helena got out her handgun, crying, and said "Sorry", before shooting Deborah in the head, killing her, and her corpse fell off the edge.