highlight:
Rider's past as Medusa was told in details in Type-Moon's own way. She was the youngest daughter of the three Gorgon sisters. They lived together on an island said to be shapeless. The three sisters were equally created to be perfect maidens, with immortality and everlasting beauty, but Medusa was flawed and she grew taller and older, unlike her sisters. Her sisters, however, were selfish and made Rider do all the household work. It was so much that it caused a trauma for Rider today that she fears short and cute girls, like Ilya. While the sisters lived there, many invaders from outside the island came for fame and for her beautiful sisters. Medusa fought those warriors to protect her family, but eventually she was enjoying the battles more than so protecting her sisters. She eventually turned into a real monster and ate her sisters. She was later on defeated by Perseus. At the last moment, she found out how much she enjoyed being with her sisters.