Talius is a mutant who resides in the basement of the library of the Followers of the Apocalypse. Talius is a vault dweller from Vault 13, sent out by the Vault 13 overseer to find a water chip. He was captured by super mutants and dipped in the Vats, which led to a rare transformation into a ghoul-like mutant similar to Harold, as opposed to the typical super mutant. He was rescued under ambiguous circumstances by the Followers of the Apocalypse, in his words, "from the full effects of the transformation into a heinous beast". He joined as a full-fledged member shortly afterwards.