Franken Stein (フランケン・シュタイン, Furanken Shutain) is an eccentric but extremely talented doctor and Meister who is known to be the strongest Meister to have graduated from Death Weapon Meister Academy and formerly Spirit Albarn's first weapon-partner. He later becomes a teacher at the school upon Death's request and was later assigned to act as a Meister to Marie Mjolnir.