Fawkes was one of the test subjects for the Vault 87 FEV Super Mutant testing, He was trapped in an isolation room that only contained a single terminal which helped him learn. He's released by the Lone Wanderer and will assist them through the worlds of Minecraft, Mass Effect, Skyrim, Halo, Christmas, LittleBigPlanet, Greek Myth, Halloween, Super Mario, Chinese Myth, Adventure Time, Norse Myth, Egyptian Myth, Pirates of the Caribbean, Nightmare Before Christmas, Steven Universe and Toy Story.