Kujou, Haruka

九条悠

An 11-year-old American university graduate who befriends Akira. He is wealthy and resides in a vast mansion. As the heir to the Kujou family, he represents a lineage famous for conducting daemonic experiments using traditional yin and yang techniques. To atone for his ancestors' sins, Haruka volunteers to fight the Kokuchi alongside Akira, even though he is physically unable to combat them.
In the anime, he forms a close bond with Kou, and the elder persuades Haruka to address him as "Onii-chan" shortly after their meeting.
He wields a crossbow. Haruka was created specifically for the anime and does not appear in the manga.