Ophiuchus Shaina trained in the Sanctuary with other female trainees through her fiercely violent fighting style and nature, which earned her an infamous reputation. She became a fearsome opponent because she was perceived as the most powerful female Saint.Shaina wears the Silver Cloth of Ophiuchus, which represents the constellation Ophiuchus, the snake bearer. It is depicted as half a person with a cape, holding a cobra. The version of the anime adaptation doesn't differ greatly, except that the head piece has been simplified and the pelvis armor piece has been removed.
Source from Wikipeida