Saya Kamijou

Saya is a young girl who transfers into Yuuma's class along with her twin brother Shinya, who is also a mage. She was initially mistaken for a ghost by Hachisuke after he met up with her one night by chance at school. Her magic wand is named Sanbach (サンバッハ) and takes the form of a violin bow. They have been serving the Shikimori family (Ibuki's family) for generations.