Lock (錠前, Joumae ) is a Demon Tool used by Arachnophobia in it's magic-based security system.[1]


Like its name implies, the Demon Tool resembles a giant rectangular padlock with a large keyhole in it. A glowing light is seen through the keyhole and many pipes and wires connect the Lock to the building in which it is protecting.[1]


Lock is capable of creating a powerful, magic barrier that forbids entry in specific parts of a location in which is built to be protected.[1]


  1. 1.0 1.1 1.2 Soul Eater Manga: Chapter 54