Bob Doyle was a survivor who resided in Cynthia's gang, and he was the watchman for the community, spending most of his time in a tower.
In the quest in which the Survivalists must retrieve Zee Franklin's jewellery, which Cynthia Rogers had stolen, the Survivalists arrive at the gang's gates.
The Survivalists either siege the encampment or force Cynthia into surrender.
During the siege, Bob is either killed in the chaos, or he can be recruited if the Survivalists slaughter Cynthia and the rest of her gang, but he is left alive. If neither, Bob will be left in the base, surrounded by the corpses of his friends, plotting revenge.
He also has a brother, Will Doyle, a Los Ceres survivor.