Chihaya, or Yamase as Kazuki calls her, is Kazuki's childhood friend and is in the same year as Kazuki at Aoi Academy. Tsukiji describes Chihaya as a comet that circles around and visits our system every once in a while. For most of their childhood, Chihaya did everything she could to prevent Kazuki from using any of his magic. However, when they got older, Kazuki began avoiding her making her feel like Kazuki hated her.