Jinx is the son of Underlust Sans and Swapfell Sans.
Jinx, effectively being the son of pure lust itself, has some... interesting fashion choices. He wears a purple jacket, like his father's, a pair of shorts that only go down about 3 inches, and a pair of purple boots, like that of Swaplust Sans'(Except a darker shade). He also has a deep purple tongue and genitals, which eventually turn yellow for no apparent reason, except to match his new taste in clothing.
He is like a combination of UL Sans and SF Sans. He is sexual, and lustful, yet he can turn things violent fast. He is extremely lustful to Pretty much anyone except his parents. He has always had a thing for carrot papyrus though.
While he'd much rather solve things through sex than violence, he can fight, as the son of Swapfell Sans. He uses bones of the colors white, orange and blue, gasster blasters from UL sans, and even has a dagger if needed, however he rarely, if ever, fights.