Rory Mercury

ロゥリィ・マーキュリー, Rory the Reaper
A demigoddess and an apostle of Emroy the god of darkness war violence and death. Despite her antediluvian age she has the appearance of a 13yearold girl. She is widely known as Rory the Reaper due to her wielding of her halberd as a scythe slaughering those who offend Emroy and those she views worthy of being punished by death. Her gothic lolita dress is an outfit for priestesses. In terms of age she is the third youngest Apostle of the Twelve Apostles. Source: Gate Thus the JSDF Fought There Wiki