Fate/kaleid liner Prisma Illya

Ordinary elementary school student Illyasviel von Einzbern transforms into a magical girl when Kaleidostick Ruby decides she would make a better master than the sorceress Rin Tohsaka. Having been assigned by the wizard Zelretch to gather the seven Class Cards that each hold a Heroic Spirit from mythology, Rin discovers that she is powerless to influence Ruby's decision and must instead oversee Illya while she completes the collection of the Class Cards. A girl named Miyu, the contractual master of the Kaleidostick Sapphire, which similarly abandoned its original master and Rin's competitor, Luvia Edelfelt, becomes Illya's buddy and rival during her adventures.