Adam Whately from Fallout

Adam Whately dubbed himself the Last Son of Atom after studying under Confessor Cromwell in the Capital Wasteland, and declared himself a prophet. He then travelled to the Crater of Atom south of the Commonwealth, and attempted to convert Mother Isolde to his unique theological perspective. She found his new ideas to be heretical, down to his very moniker, and banished him from the village. Several of her followers left with him. Isolde dispatched her daughter Dawn to reside among his sect and spy on him. The wandering leader grew close to her, as he grew more deranged from chem use. She wrote that he whispered in his sleep of an obelisk waiting for him beneath the earth. He ultimately transformed Sister Dawn into a glowing ghoul giant out of spite for Isolde. With the support of his zealous flock, he searched the Glowing Sea for a mysterious Buried City, which he believed to hold a power he could use to conquer the Wasteland. He found it beneath a research facility once operated by his ancestor General John Whately, which was in turn hidden beneath a Catholic church. The Last Son spent several weeks experimenting on his followers using the hallucination-inducing crystalline device he found in the Buried City before integrating it into his power armor, which now grants him influence over all creatures for miles around. He named this mind-control device "Atom's Glow." He went on to tame the Gigapede, and launched a crusade against the Commonwealth, culminating in the Winter of 2286. Isolde considered him a heretic and false prophet, leading the Children astray with promises of awakening Atom and opening gateways to other universes, and was ashamed that several of her flock had left to serve him. She dispatched messengers, including Brother Lucius, to head north and warn the settlements of the Commonwealth of the coming danger, as well as to request help in bringing peace to the Great Glowing One.