Not much is known about Atwater's background or early life except that they were a soldier in the United States Military.
In July of 2033, Atwater was in a patrol with O.I.C. Waters, Private Shah, and Private Coolidge on the outskirts of the Boston area. They heard and/or saw an Infected near a collapsed office building. The patrol went to investigate and was soon attacked by multiple Infected, where Atwater was killed.
Marlene·Ethan·Head Surgeon·Kari·Marc·Andrea·Roger·John· Greg · Tania · Robin ·Riley Abel·David Michael Vigil·Ben Glueck· Philip Liu · Joseph Lenz · Michael Kiper · Melinda Davidson · Shiyao Jiang · Hui Wang · Alex Raymond Vincent · Peter Mrozik · Kazden Risk · Colby Reed · Lucas Rios · Josh Scheffler · Robert Righetti · Eddie Fuentes · Matthew White · Ryan Oliverio · Brent Pino · Hope Pino · Alex Rohner ·Joe Warren· Erik Griggs · Sadie Pearle Hickman · Travis Kristof · Paul D. Braun · Katerina Perich · Nicole Hoo · Natalie Hoo · Bryony Stewart-Seume