Fate/Kaleid Liner Prisma Illya is a Japanese anime series based on the Fate/stay night visual novel. It presents an alternate universe where Illyasviel von Einzbern becomes a magical girl. The series blends magical girl elements with the Fate franchise's action and fantasy themes, offering a unique and engaging storyline. It features various spin-offs and adaptations, expanding the Fate universe with its distinct charm and humor.