Rufio

Rufio is a feeble old man, called an old "codger" by the proprietor of the Inn of Ill Omen. In the quest A Knife in the Dark, you are required to kill in order to gain membership of the Dark Brotherhood. He is considered physically weak, but very spiritually attuned. Despite his attunement, he is an easy mark and provides little resistance. During the Dark Brotherhood quest, if you choose to talk to him, he implies that sometime during his life, he accidentally killed a girl he was trying to rape. It is implied by a prisoner in the Imperial Prison that the girl was Claudius Arcadia's wife or sister.

Rufio's ghost (Oblivion)
During the quest The Purification you are given a scroll by Lucien Lachance which allows you to summon his ghost for aid. Since scrolls are often subject to the duplication glitch, it is possible to possess and use more than one of these.

Related Quest

 * A Knife in the Dark