Jericho (Fallout 3)

Jericho is a companion NPC in Fallout 3, and is found in the town of Megaton. He reveals that he has left the life of a raider in the Wasteland behind him, tired of the killing and violence.

Jericho can become a companion with the Vault 101 Dweller, hiring him requires that the Vault 101 Dweller has a negative Karma and pay him 1000 caps for supplies. His default equipment is a Chinese Assault Rifle and Combat Armor. Other equipment can be traded to him that he will in turn equip. When in Power Armor he can withstand a lot of damage, however if he is taking a lot of damage he'll also need a lot of stimpaks. If you choose to fire him he will return to Moriarty's Saloon until required again. Jericho does not seem to care if your Karma goes to good after you hire him. However, if you choose to fire him and re-hire him with a good karma he will tell you to pick up some bad habits before he joins you again. If you choose to destroy Megaton in the The Power of the Atom quest then Jericho will still wait there if you fire him. If you join back up with him he may complain about the radiation around the newly destroyed Megaton.

If you talk to him some more (and give him 20 caps) he reveals that Moriarty hides his daily profits from his saloon in a footlocker at his bed, and that he wears the key around his neck. He is also known as one of the NPCs that fall to their death from high places in Megaton, if you want to bring him back after this see here for how to do so.