In the manga, Jigen is introduced as a cynical, backstabbing, lazy, henchman, with whom Lupin never gets along. He evolved into an easily amused, loyal, & jolly best friend & partner-in-crime, who occasionally brawls with Lupin over petty things. He was never a famous marksman, quickdraw, or sniper - in fact, Fujiko & Lupin could draw faster than him. He rarely hit on women, but when he did, it was sleazy, with a keen interest in girls who play hard-to-get. Unlike Lupin, though, he never scored and was often beaten up by girls. The main remnants of his original personality that carried over to the anime were his cynicism, dry wit, caution and disgust for Lupin's tireless pursuit of women.
Lazily, sarcastic, but he can be tender when he wants
