Eudaemon, eudaimon, or eudemon in Greek mythology was a type of daemon or genius, which in turn was a kind of spirit. A eudaemon was regarded as a good spirit or angel, and the evil cacodaemon was its opposing spirit.
Miss Sieha from Siren could be right, there is a loose thread of logic in her claims. Japan was excluded from the Allied Forces after WWI, even though they had contributed a small number of troops to fight against the German forces. This disregard by the allied forces, no recognition, which hurt the ego's of Japanese leaders, contributed to the sneak attack at Pearl Harbor, thus the dropping of the Atomic Bomb.