Intro. Mashu (alter) kyrielight is the what if version of Mashu who lost Ritsuka Fujimaru in the final battle of Solomon Temple, undergoing a class change in part thanks to King Demon Goetia who altered his class and gave him a "Longinus" weapon, a divine weapon that is capable of cursing whoever is injured by it. Resistance to magic A, immune to lesser degrees of magic, and a complete and independent Servant capable of traveling between the belts, said mashu was "left insane" and destroyed wanting to cling to the image that Ritsuka may still be alive even though she saw him die and will defend herself and attack anyone who opposes her, she hates humanity for having allowed Risuka's death in their final combat due to the lack of support, Until one day she was summoned to Chaldea, she went crazy when she saw that her Sempai was still alive, Ritsuka Fujimaru was alive before her eyes and her Mad Enhancement made her Yandere making her never separate from him because she lives for him and will do everything Ritsuka says because it is her life.