Yukina Himeragi is a Sword Shaman in the Lion King Organization which is appointed as an observer of the Fourth Progenitor. If by any chance Kojou becomes a threat for society she has orders to kill him. Yukina uses the spear Schneewalzer (German for Snow Waltz), which she calls “Sekkarou”. It has the power to harm a Progenitor. She’s the classmate of Akatsuki Kojou’s little sister – Nagisa and is her best friend. Himeragi is jealous of every girl that gets close enough to Kojou and often sarcastically reminds him that SHE is his partner. As a girl raised in isolation she often rushes her decisions with the mindset that it’s the right decision.