Ashiya Douman, Class Name Alter Ego, is an Alter Ego-class High-Servant working as one of the three Alter Ego apostles of the Alien God in the Lostbelts of Fate/Grand Order. They are working in tangent with the seven Crypters attempting to supplant the Greater History of Man with the Lostbelts. He is also summoned by Ritsuka Fujimaru. Douman is described as having "eyes like polished obsidians," "face constantly wearing a smile cruel to the point of perfection," and a "body so fierce that it could tear his enemies apart barehanded, if needed." He is a like a "Youkai Beast in human shape, who manages to leave an impression of beauty on those who behold them." He is described as a voracious, carnivorous beast whose voice is akin to a ghost of an evil king who devours gods, rips them apart, and makes their flesh his own. An ego guided by a greater existence, whose core brims with evil and malice. He is highly sadistic, offering aid to restore the memories of Kato Danzo simply because he would not draw satisfaction from murdering her loved ones if she did not remember them. He is also quite arrogant, vainly assuming he can easily defeat Musashi, Ritsuka and company only to contort his face in ugly fashion and rant furiously when he is defeated.