Body - Big Breast
Exotic, Melancholy, Emotionless Expression,
Background - Heroic Spirit
Mystic Eyes of Petrification (100% chance to Petrify)
Bellerophon: Bridle of Chivalry (Piecing attack, All targets)
Her real name is Medusa, the Gorgon from Greek mythology. Born from the wishes of mankind for ideal goddesses, all three Gorgons were blessed with beauty. But unlike her sisters, Medusa was mortal, and fated to grow older and taller over time. Medusa was also cursed with Mystic Eyes, which transmute all living flesh under her gaze into stone, requiring her to wear a blindfold.
Jealous of the sisters' allure, Athena goaded the Gorgon's worshippers into attacking them, forcing the sisters to take refuge on the Shapeless Isle. This disgrace left Medusa bitter and spiteful of humans, her resentment intensifying as she killed invading men who lusted after her sisters. Over the years, Medusa became eager to slaughter and ingest humans, which spread infamy about her as an icon of terror. Eventually, the demigod Perseus, equipped with five Noble Phantasms, proved capable enough to decapitate Medusa, ending her tortured and dismal life.
Summoned into the 5th Holy Grail War initially by Matou Sakura, she became the Servant of Shinji when Sakura, pressured by Shinji, yielded her Master's right to him. Rider holds no love for Shinji, seeing him as vile and predatory, but obeys his commands as a dutiful Servant. Because of their similar backgrounds, she is empathetic of Sakura, and seeks to protect her whenever possible.
Their first encounter with Shirou and Saber saw Rider quickly defeated. Shinji, fearful for his own life, abandon Rider and fled. Though on the verge of death, Rider somehow managed to keep herself together enough to return to her true Master, Sakura, and re-establish contact with her prana, healing herself. When Shinji, sore over his defeat, attempted to take it out on Sakura, Rider was able to stop him, at the same time taking revenge for his treatment when she was under his command.
Humiliated, Shinji enlisted the aid of his grandfather, Matou Zouken. Sakura, however, did not wait around for Zouken to arrive, choosing instead to flee from Fukuyi City.