OVA
Description
Yukina Himeragi is a petite Sword Shaman of the Lion King Organization, assigned to observe and potentially eliminate the Fourth Primogenitor, Kojou Akatsuki, if he becomes a threat. Nearly sacrificed to a Spirit Wolf at age six, she was taken in by the organization seven years prior to the main events. There, she underwent rigorous training under Yukari Endou alongside Sayaka Kirasaka, preparing her as an attack mage. Her isolated upbringing fostered a naive worldview, causing her to misidentify everyday objects like golf clubs as weapons.

She appears as a teenage girl with shoulder-length dark hair and dark golden-brown eyes, often noted for her serious expression. She typically wears the Saikai Academy uniform and carries her primary weapon, the anti-demon spirit spear Schneewalzer (also called Sekkarou), concealed in a black bass guitar case. Despite her naivety, she displays acute tenacity in combat. Characterized by emotional vulnerability, she frequently becomes flustered or defensive, especially regarding her developing romantic feelings for Kojou. While she experiences jealousy toward other women close to him, she avoids bitterness, often befriending them and redirecting frustration toward Kojou.

Her abilities center on being a Sword Shaman. She wields Schneewalzer, enabling offensive and defensive enchantments and generating divine vibrations to negate magic. High compatibility with this weapon risked her permanently transforming into a Faux Angel, granting flight and enhanced powers, mitigated by a ring from her mentor Yukari Endou. Additional capabilities include Divine Spirit Possession (summoning spirits for battle, risking ego loss), Shikigami Summoning for communication or alerts, and summoning the familiar Minelauva Iris inherited from Hektos. Her magical training is limited, but she employs techniques like "Pulsation" for direct combat amplification.

Her narrative evolves from detached observer to Kojou’s first Blood Servant, a bond causing her blood to carry his scent. This role activates his first familiar, Regulus Aurum, intertwining her destiny with his. Across conflicts like the Kingdom of Valkyria incident, she transitions from duty-bound monitor to a protector personally invested in his safety and humanity. Future timelines reveal she marries Kojou, bears a daughter named Reina, and maintains her guardian role while navigating familial responsibilities.

Trivia includes her measurements (B76-W55-H78), aerophobia (fear of flying), fondness for cats and Nekomatan plushies, proficiency in English from advanced education, and dislike of mayonnaise.