Mysterious Heroine X - 謎のヒロインX
(A-X, MHX, Mysterious Racer X, Mysterious Heroine Z, Ultra Heroine Z, MHXX, Ecchan, MHXA, MHX Alter, Mysterious Heroine X Alter, Mysterious Idol X Alter)
About
An unknown heroine who tasked herself in eliminating Saber-class heroines during Back Alley Satsuki - Chapter Heroine Sanctuary. Bearing the code name "A-X", X was a stranger who came from the "mysterious dimension" called the Servant Universe. Seeking to accomplish her "true, dearest wish" to "defeat all Sabers", she brandished Secret-Calibur and left her home town, leaving behind an "expression full of bitterness."
