David Walker, also known as "Hesh," is a 28-year-old American Lieutenant with green eyes, and 6'1" tall, and brown, shaved hair. He is Logan's older brother, and part of the task force "Ghosts."

He is protective, fatherly, kind, and reckless but determined. Hesh has a German Shepherd named Riley. Hesh is Logan’s older brother, 26 years old, blonde haired and with dark brown eyes, he's kind, but quiet. They fight to defend the US from the Federation of the Americas, an enemy organization.