Age: 16 years
Birthday: Late December (self-claimed)
Height: 180 cm
Weight: 53 kg
Shoe Size: 25 cm
Blood Type: Unknown
Likes: The darkness of night, chikuzenni (type of chicken stew consisting of taro, carrots, burdock, etc), lemonade
Dislikes: Bright places, people who judge based on appearance
Specialties: Pitching, mental calculations
Techniques: Iga's "Kira" (伊賀「気羅」)

A 16-year-old ninja in the Kairōshū who uses the forbidden technique "kira". This technique shoots the user's ki into the body of a target and controls it from the inside out, which can cause the target's bones to break or their body to completely explode. The cost of using this technique is the loss of the user's life force, gradually losing their five senses and eventually dying. According to volume 4, he has roughly two more months to live. He appears to be very sensitive, as he used the kira technique and almost killed a delivery man just because he called him a "cute kid". He is also shown to eat at a rapid pace. After first abducting Miharu and taking him to an abandoned train car, Yoite tells Miharu his friends will die from the ki he implanted inside them; unless Miharu utilizes the Shinrabanshō to grant his wish, to be "erased" from existence. This turns out to be a lie, but Miharu still aims to grant the wish. Yoite usually wears all black, with leather gloves, and a tan-colored gatsby cap.