He is described as a tan man, with a pock marked face, leather jacket and a wicked looking knife, also named "Little Jesus". He likes to dress in heavy black leather and has an unhealthy obsession with sharp bladed items, especially knives. He is a rather aggressive and simple fellow, with something of a tendency to exaggerate his sexual prowess.
Males with a Strength of 6 or higher, or wearing combat armor, can get Lil' Jesus to put in a good word with Señor Mordino, allowing you to work for the Mordino clan.
Speaking to Lil' Jesus with a knife out will prompt him to mock your fighting style. You can proceed to get a 5% bonus to Melee Weapons if you follow through the dialogue and pay him. Females with a Charisma of 6 or more can sleep with Lil' Jesus to get around paying, and will get a bonus 5% if they get a good sex rating.