Franken (フランケン, Furanken)? is a demon in the series.
Frankenstein's monster (or Frankenstein's creature, often incorrectly referred to as Frankenstein) is a fictional character that first appeared in Mary Shelley's novel, Frankenstein, or The Modern Prometheus. The monster is a golem or homunculus created via alchemy, while popular incarnations show or describe the Monster often being created from freshly deceased cadavers and advances in the study of biochemistry and bio-electrical conduction.
Franken can be obtained in Red Book by beating Setsuna Kai at BattleNet.
DemiKids Light & Dark
"A powerful and fearsome cyborg created by a renowned mad scientist from Dem."
Known as Morton, they can be found throughout Dem and Rem in towns. In the Dead Future of Rem a Morton will be in the fusion room. He will mention a Lemon, Melon, and Strawberry in conversations. When the Protagonist has collected all three and then talk to Morton he will fuse the three Icy demons together to make the Icy Trio, then disappear. He will also be gone when the future is changed, so one must do it before then.