James Mercer better known as Jim, is a rugged man in his late 30s, born and raised in Kingman, Arizona. A former mechanic, Jim is a no-nonsense character who carries the weight of personal losses and trauma, which has left him somewhat detached and withdrawn. Despite his rough exterior, Jim has a strong sense of loyalty and a deep need to protect those close to him, though he often struggles to express his emotions. His journey in Unknown reveals hidden vulnerabilities, as he faces unexplained events that challenge his perception of reality.