Xiu is considered as the "Right Hand" of the 4th King Argui. Unlike the others he isn´t a demon but rather a doll-like creature created by his King. He has his own consciousness and even developed some kind of emotions, which are still expressed very weakly by him. Even tough he is on the same rank as the other Generals and is considered free, he follows his King on every step and does anything his King wants him to do without questioning it. Xiu usually does the dirty work but he doesn´t mind. As for the legions he commands: He has control over 4 legions only, which is very little compared to the size of the other Kings army. The reason for this is mostly Arguis Relationship with Xiu. Argui wants Xiu to be around him like a dog the whole time rather than sending him to the soldiers or battlefield that´s why he made another "doll", Alloces, to take over Xius responsibilities as a General. This may seem like Xiu is just like a pet following orders but he does have a personality, which is still developing therefore very weak. His developing Personality is expressed by the fact, that Xiu starts to question things instead of just accepting them and finds interest in developing Friendships, which he never cared about before. He even developed some likings, such as Ice Cream and collecting Skulls, even though the second Liking is linked to his King. Realizing, that he has no true self and identitiy has resulted in Xiu starting to hate himself and what kind of creature he is.