Ballou was a member of Sean's support team, working for the Company.
Ballou and other members of his team accompany Thompson, Jr. and Donna Dunlap on a mission to bag and tag a dangerous evolved human. They are ordered to safeguard the two agents' extraction point.
Later, Ballou follows Sean Fallon and the rest of the team to investigate an explosion. They find Thompson Jr. and Donna on the floor motionless, and their target, Lewis, raging.
Sean Fallon orders the team to open fire on Lewis, but he sends his thick roots into the ground, disrupting the team's attack. Rosetti tells Ballou to call in the Haitian to negate Lewis's power. Rosetti is then killed by one of Lewis's roots, followed by Ballou, who is stunned and then killed when a root snaps his neck.