Also known as: マジカルルビー
A sentient Wand known as a Kaleidostick that is Prisma Illya's partner. Magical Ruby used to belong to Tohsaka Rin, but she abandoned Rin and contracted with Illya instead. Magical Sapphire is her younger sister.
In Illya's Zwei form, she merges with Magical Sapphire into a single kaleidostick. In Illya's Swimsuit Archer form, Magical Ruby is depicted as a water nozzle attached to a Hose.