20 years old. Height: 173cm. An androgynous and cute boy characterized by fair skin, large eyes, and a well-defined small face. Usually, he maintains a super-angelic, cute appearance and atmosphere, showing a friendly and charming side to those around him. His true nature is that of a cold-blooded, ruthless yakuza. He possesses a cruelty that stops at nothing to achieve his goals. He is tenacious, relentlessly cornering his targets like a snake. While he shows a forceful and cold attitude toward the heroine, the gap created by his distorted obsession, occasional kindness, and glimpses of a traumatic past is portrayed as his charm. He has a strong core and a sense of responsibility; once he makes up his mind, he is a man more reliable than anyone else. In the battle to become the groom and successor of Japan's largest yakuza organization, the Karin-gumi, he participates as the "Young Head of the Hejima-gumi." Kira's original goal is to seize the position of the next leader of the Karin-gumi and claim its rights for himself.