[Edit][Edit]
Real name: Koudou Sora (?) (香道そら)
Age: 16
Birthday: Latter third of December (according to himself)
Height: 180cm
Weight: 53kg
Shoe Size: 26cm
Blood type: Unknown
Like: Night scenery, Chikuzen'ni (A chicken stew with taro and burdock root, and carrot)
Hate: Bright place, People who judge others solely on their outward appearance
Skills: Pitching, Mental Math
Kinjutsu: Kira
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. In anime version, he has a few months to live.
He slowly begins to form a bond with Miharu after a promise that the two made to each other. He will protect Miharu to gain what he wants. Although, in the beginning he tells Miharu that he will kill Miharu's friends if the promise is not fulfilled. That promise was, by using the Shinrabanshou, Miharu would erase Yoite. Later, Yoite reveals that he does not actually want to die, and wonders if he ever truly was alive. In chapter 47, Yoite tells Miharu that he never actually put his ki into any of Miharu's friends. He just said that so Miharu would do what he wants. It is also revealed in 47 that Yoite is neither male or female.
Yoite was even shorter, and more fragile than Miharu before the side effect of kira starts, which makes Yoite grew into maturity in just 3 days. It was mentioned that Yoite was covered with blood when Hattori Tojūrō took him back to Kairōshū. Hattori knew the secret of Yoite and persuade Miharu not to fulfill his desire. At the end of the chapter Miharu and Yoite betrayed Kairōshū and escaped to Banten village.
Yoite's real name has finally been revealed in chapter 46. His real name is Sora. He seems to have a younger brother named Koudou Tsukasa. Assuming that they're actually related, Yoite's full name may be Koudou Sora. It is also said that his parents abandoned him when he was a child and he hasn't seen them since then.
Yoite visited the church three times a month, sitting alone on the last row of the church just gazing at the light from the window. Kids never went near him nor hurt him. This lasted for three years until two years ago, when Tsukasa took him away from the town. Yoite hasn't come back since then.
