Prior to the outbreak, Nicholls was fighting in Afghanistan along with the rest of his squad which included a lot of members that would eventually become the Reapers. Upon returning from war, he struggled to find jobs or deal with trauma, but the relationship between him and his comrades remained strong. He then decided to become a mercenary.
Nicholls is among the Reapers who ambush Maggie's group on the road leading to Meridian. They kill Roy and severely injure Cole, prompting Maggie's group to scatter into the woods, with Nicholls and the other Reapers going after them.
Nicholls and his fellow Reapers attack the members of Maggie's group, managing to kill Cole and injuring several others. At one point, Nicholls is shot in the neck by Daryl, prompting him to run away. The injured Reaper eventually discards his mask and limps through the woods. He is found by Gabriel Stokes, who survived the Reaper ambush, and is stabbed in the head by the priest.
- Killed By
Daryl managed to shoot Nicholls with one of his arrows, thus leading him to bleed out in the woods. Gabriel eventually finds Nicholls and stabs him in the head.
This list shows the victims Nicholls has killed:
- Ms. Adams (Possibly)
- Teresa (Possibly)
- Roy (Possibly)
- Duncan (Possibly)
- Numerous counts of enemy combatants (Pre-Apocalypse)
- Possibly unnamed Meridian residents
- Numerous counts of zombies and unnamed people
- In the Memoriam on Talking Dead for "Hunted", he is credited as Pray for Me Reaper.