James serves as the merchandising department chief at the fictional Line Corporation. He is the son of the company president, a fact that shapes his workplace interactions. With blonde hair and a pronounced obsession with his appearance, James exhibits narcissistic traits by constantly checking his reflection. His office contains 48 mirrors strategically placed in locations such as desk drawers, keyboard backs, and the ceiling to enable uninterrupted self-viewing.

James integrates pantomime skills into his professional conduct, stemming from brief prior experience in mime performance and a four-day study trip to New York. He occasionally employs miming during presentations or meetings. His work habits include prioritizing personal grooming over responsibilities, such as adjusting his hair during discussions about project deadlines.

Within office dynamics, James receives unreciprocated admiration from his subordinate Cony, though the series underscores his lack of romantic interest in her. He maintains professional interactions with colleagues Moon (product design division chief), Brown (product planning division chief), and Jessica (merchandising department OL). Specific episodes highlight his behavior: in "Presentation," he interrupts proceedings to perform mime; in "Glass (Cony)," he examines his reflection while Cony cleans windows; and during meetings, he frequently pauses to check mirrors. His established traits remain consistent without significant development across the series' 114 episodes.