A mysterious girl who lives in the Phantom Field, she has no idea how long she has been inside of the Field, nor that she is actually within it. She claims to be fond of riddles. When she met "Me", she offered her the chance to find her little sister who had somehow gone missing into the bottom of the Phantom Field.

XBlaze – Lost: Memories is the sequel to XBlaze – Code: Embryo. Characters such as Es and Tōya Kagari return, while new characters "Me", Nobody, little sister, Kiri, and Brain Cat make their debut. The opening theme song is sung by Haruka Shimotsuki. This game covers events of Code: Embryo from different perspective.