Donnie lived in happy tranquility with his friends within the confines of Vault 49 for over 250 years, this was ultimately destroyed after an invasion by raiders who had managed to break through the vault's defenses. All of the robots (besides Cynthia) were destroyed while trying to protect their wards. The centuries old youths were beset by the raiders, all either raped or killed by their attackers. Those that survived were taken as slaves, and the vault was pillaged, the raider's parting act was stealing the facilities Fusion Core, meaning that the whole place would soon be inoperable.

The only saving grace for Donnie was that he was exploring the vault's many maintenance tunnels when the raiders had broken in. He was hidden away with Cynthia while they wrecked their carnage and was thus free of their brutal touch.

With the vault ransacked and soon to be out of power, he was forced from the only home he had ever known and had to survive the hardships that the wastes presented. The only silver lining he could make of it was that he still had Cynthia with him.

Over his decade within the wastes he grew and developed his skills. Crafting himself weapons and armor to better handle any threats that he might encounter. Most of his effort has gone into improving his mommybot, and it has paid in spades. With her, the two wander from town to town in the PNW, taking the odd job here or there (mainly fixing and repairing any broken devices or equipment or taking a delivery job) but never staying in one place for too long. Nothing ever seems as good as their erstwhile home had.

His most recent project might have changed that however, a rundown diaper factory, in desperate need of repair. Scavenging for fresh diapers is hard work, but after finding the factory a few years ago he's been steadily stocking up supplies and tools to fix and refurbish the area. Perhaps it could be the start of a new home for him?