Talk:Mysterious Heroine X/@comment-4966296-20160119210307

http://forums.nrvnqsr.com/showthread.php/3552-Type-Moon-April-Fool-s-2013

http://typemoon.wikia.com/wiki/Back_Alley_Satsuki_-_Chapter_Heroine_Sanctuary#Back_Alley_Satsuki_-_Chapter_Heroine_Sanctuary_.282013.29

Cool character design, and more saber osmosis ain't terrible. Links above are where the design originated from, she is tasked to eliminate all Saber Classes in Back Alley Satsuki: Chapter Heroine Sanctuary, thus her assassin title.