Kristen De Silva is a fellow student and love interest of Andy Barclay. She is also the best friend of Ivers, who is often seen by her side.
Kristen is the daughter of an outstanding superior officer. She attends Kent Military school, and seems keen to follow in his acclaimed footsteps.
But the school is not very for her, as she is often disciplined for her "back talking" to higher officers, especially lieutenant colonel Shelton. Despite being a military cadet, it does not affect her independence nor her willingness to just be a teenager and goof around at times.
Unlike most of the students, Kristen is very friendly and warming to the new student Andy. With the exception of Cochran, no one else knew of Andy's past, and it seemed he prefers it that way.
She becomes his instructor-of sorts, helping him get the hand of things around campus. Eventually, the two develop a romantic attachment to each other. He begin to confide in her with parts of his past, but he keeps Chucky out of his conversations.
Later in the night, Kristen and Ivers break curfew to sneak into Cochran's office. Unknown to them, by entering his office they had inadvertently prevented Chucky from transferring his soul into Tyler's body.
Exploring the office, they find him in closet with the doll. Trying to annoy the boy, Kristen borrows Ivers' lipstick and smears it all over Chucky's mouth, much to Tyler's personal dismay. When they hear Cochran returning to his room, they grab Tyler and quickly leave, forgetting Chucky.
After they left, Chucky attempts to kill Cochran, but just the sight of the doll alive gives him a fatal heart attack.
Although many were saddened by Cochran's death, Shelton tells them all that the annual pain ball war will go as planned. This would be a mistake, since Chucky replaced the paint ball bullets with real ones.
When the game begins, Andy and Kristen share a small moment of passion and kiss. Later on, Andy sneaks away to find Tyler. While on patrol for her team, Kristen is attacked and held hostage by Chucky, using a grenade.
With that, he uses her to lure out Andy and bring both teams to fight one another. Andy is forced to exchange Tyler for Kristen.
Things would go from bad to worse when the red team descends upon the area, and opens fire with their live rounds. Shelton is the first to be killed in the crossfire.
Amidst the chaos, Tyler makes a quick getaway, and before going after him, Chucky tosses a live grenade at the cadets. Recognizing the danger, Whitehurst bravely leaps on top of the grenade and sacrifices himself to save the others.
Although both were shocked and distraught by his death, Kristen and Andy follow Chucky, knowing Tyler is still in danger. Eventually they find themselves led into a carnival, and see Tyler being forced by Chucky into a haunted house.
As they head in, Tyler is eventually able to break free from Chucky, but in the ensuing battle Chucky shoots Kristen in the leg, leaving Andy to fight him alone.
After Chucky was killed, she was taken to a nearby hospital for her gunshot wound. But what became of her after is never really stated. However, in Curse of Chucky, Andy has photos of many of his friends, family and relatives.
Kristen's photo is not among them, possibly meaning that he did not keep in contact or their relationship did not work out.