|This Servant is a limited Servant. It is only available during special summoning campaigns. When no such campaigns are active, this Servant cannot be summoned. No plans have been revealed to add this Servant to the permanent summoning pool.|
This page is for the Berserker version. For ★5 Assassin, please refer to Mysterious Heroine X.
|Active Skills||Passive Skills||Noble Phantasm||Ascension||Skill Upgrade||Bond Level||Biography||Trivia|
Mysterious Heroine X (Alter) is available for summoning during the Valentine 2017 Event Re-Run.