Jinon Won acts as an antagonist within the narrative, operating as a skilled assassin within Donald Bachmann's organization. He frequently partners with fellow operatives Nikka and Mifa.

His physical appearance projects a youthful, polite demeanor marked by calm passivity and soft-spoken dialogue. This contrasts sharply with his partner Nikka's more emotional and aggressive nature, creating a distinct "Red Oni, Blue Oni" dynamic between them. Despite this unassuming exterior, Jinon Won proves highly dangerous through his actions.

He wields throwing knives with ruthless efficiency as his primary combat method, embodying the "Psycho Knife Nut" trope. A key tactic involves manipulating targets by exploiting personal connections, such as coercing cooperation through threats against a central character's adoptive mother.

Functioning initially as a "Starter Villain" confronting the protagonists, his actions escalate to directly impact key figures. He employs stealth to knife Euripedes Ritzland in the throat during an assassination attempt; this attack ultimately fails to kill Ritzland.

Jinon Won participates in the central conflict stemming from Donald Bachmann's vendetta against the Nobel family. He joins the culminating confrontation alongside Nikka and Mifa, facing defeat at the hands of Chateau Dankworth and Song Ryang-ha.

Available materials do not explore Jinon Won's origins, family background, or formative experiences. His motivations appear tied primarily to his role within Bachmann's organization rather than personal history.