Mizuki Akiyama is a wanderer hailing from the kingdom of Yoru. She is a good friend of Rui Kamishiro's, and the two were close when they were studying at the Royal Insititute. Since she left the school, Mizuki has been searching tirelessly for Ena Shinonome, an ex-student expelled under mysterious circumstances. They are incredibly intelligent and skilled in many branches of magic, including alchemy and combat-based spells.