Illyasviel Von Einzbern, often referred to as Illya, is the main protagonist of the anime series Fate/kaleid liner Prisma Illya. She is a young girl who becomes a magical girl after encountering the Kaleidostick Ruby, a powerful magical artifact. Despite her initially ordinary life, she is drawn into the world of magic and battles as she collects Class Cards, which contain the spirits of legendary heroes. Illya is known for her cheerful and optimistic personality, and she grows significantly throughout the series, developing strong friendships and facing numerous challenges.