Born in 2259, Diego is Father Clifford's assistant. He came to Rivet City a few years ago with his father but was abandoned. Father Clifford took Diego in and the two have become like father and son. Diego assists Father Clifford with his church work and wants to be a priest when he gets older. He has strong feelings for Angela Staley and spends much of his free time with her. However, he is also devoted to the church. Because she is only 16, he does everything he can to keep his feelings secret, although Angela sees right through him.
Diego considers Father Clifford his only family, however, he has strong feelings towards Angela Staley and spends most of his free time with her.
During the night and day, Diego can be found in or near Saint Monica's Church. From in the late afternoon to early in the evening, he can be found together with Angela Staley on Rivet City's flight deck.
Interactions with the player character
|This character is involved in quests.|
|This character drops an ear when killed (Contract Killer).|
|This character can be enslaved with the Mesmetron.|
- A Nice Day for a Right Wedding: There are rumors of his involvement with Angela Staley. The player character can either force him to relinquish the church or the girl (by saying they will tell Father Clifford or telling him directly). If they convince him to choose the girl they will end up getting married and they have the option to attend the ceremony. One can also give Angela Staley some ant queen pheromones which will make her irresistible to Diego. Diego will then leave the priesthood to marry Angela.
- Diego may also unofficially start the Church Donations quest. If asked about donating to the church, he will tell the Lone Wanderer to give their donations to Father Clifford.
- "I'm Diego, the acolyte for Saint Monica's."
- "I...I don't know what came over me. I just lost control and seduced her. But I am an honorable man. I will make her an honorable woman. We're going to get married. I thought I would be more upset about leaving the church, but she makes me so happy."
- "Father Clifford says she is my trial. My temptation. I must chose between her and the Church. I have chosen the Church."
Diego appears only in Fallout 3.