Because the new anime Daemons of the Shadow Realm is based on a manga by Fullmetal Alchemist creator Hiromu Arakawa, you can easily assume it’s going to invest heavily in kinship between siblings, a yellow-haired older brother, and an obtuse but compelling system of magic. What I did not expect, however, was that it would borrow one of M. Night Shyamalan’s greatest twists.