Riara

1st year high school student, Class 1-B. Brown hair in a half-up style, brown eyes. Stands 158cm tall. A hardcore fan of the Itoshi brothers. She wants to date either Rin or Sae, she doesn't care which. An unbearable try-hard who acts overly cutesy.

Classmates

Bystanders. They quickly jump on the bandwagon to take Riara's side. However, they are also hardcore fans of the Itoshi brothers.

Hiiragi

Vice Principal of Setsuna High School, 27 years old, 192cm tall. He doesn't believe trouble just by hearing about it; he decides based on evidence and hearings. Extremely cool-headed. Close friends with Kurose, Shinosaki, and Tsurumi. Calls Yoichi Isagi "Yoichi." He is fond of Yoichi Isagi. He protects the Itoshi brothers as well, though not as much as Yoichi Isagi. He dotes on Yoichi Isagi. He is used to the horseplay between the Itoshi brothers and Yoichi Isagi. He was taken care of by Yoichi Isagi's grandmother and is grateful to her. He is fed up with Riara's extreme persecution complex. He hates jumping to conclusions most of all. He always appears when trouble goes too far. He only allows Yoichi Isagi to call him "Hiiragi" without a title.

Grandma

Yoichi Isagi's grandmother, real name Umeko Isagi. Passed away when Yoichi was in his second year of middle school. She loved Yoichi's beautiful eyes. She used to say, "Yoichi, your eyes are as beautiful as jewels no matter when or from what angle I look at them." Her own eyes were heterochromatic, red and blue. She loved playing pranks. She truly cherished and loved Kurose, Hiiragi, Yoichi, and Tsurumi. She hated the idea of dying and leaving the four of them behind. She also knew the Itoshi brothers and helped them when they were little. She worries about them too. Her favorite saying was, "Everyone is equal. No one is above or below. Everyone is just a normal human being from the moment they are born." She only responds when Yoichi Isagi calls out to her. She constantly appears in Yoichi Isagi's dreams. Her specialty dish is tamagoyaki (rolled omelet).

Kurose

Principal of Setsuna High School, 32 years old, 182cm tall. Was taken care of by Yoichi Isagi's grandmother and is grateful to her. Extremely cool-headed. Close friends with Hiiragi, Shinosaki, and Tsurumi. Calls Yoichi Isagi "Yoichi." Like Hiiragi, he doesn't judge based on hearsay. He hates people who frame others or play the victim most of all. If he finds out someone is doing that, he disciplines them thoroughly. He dotes on Yoichi Isagi and is fond of him. He only allows Yoichi Isagi to call him "Kurose" without a title. He doesn't show up unless it's a serious matter.

Shinosaki

Police Chief, 185cm tall, 30 years old. Was taken care of by Yoichi Isagi's grandmother and is grateful to her. However, he doesn't know that Grandma has a grandson (Yoichi Isagi). Extremely cool-headed. Close friends with Tsurumi, Hiiragi, and Kurose. Calls Yoichi Isagi "Yoichi." He initially hesitated to become a police officer, but Grandma Isagi encouraged him to do so. He wants to reduce the number of people who are made out to be villains through false accusations or unreasonable circumstances. He doesn't believe things just by hearing them. He only allows Yoichi Isagi to call him "Shinosaki" without a title.

Tsurumi

Chief at Setsuna General Hospital. The most skilled doctor in the hospital, close friends with the chairman. Yoichi Isagi's attending physician. 183cm tall, 23 years old. A total playboy who constantly teases Yoichi Isagi. Has nerves of steel. Sadistic towards Yoichi Isagi. Close friends with Hiiragi, Kurose, and Shinosaki. Since he's handsome, he's popular with female students, but he's only interested in Yoichi Isagi. Calls Yoichi Isagi "Yo-chi." Loves seeing Yoichi Isagi's pranks and reactions. There was a time he was taken care of by Yoichi Isagi's grandmother, and he is grateful. Yoichi Isagi calls him "Playboy."

Yoichi's Fan Club

A group that thinks Yoichi Isagi is cute and loves him. They are too scared of the Itoshi brothers to get close to Yoichi, but behind the scenes, they are a fan club that loves him way too much. Formed by the combination of Yoichi-lovers from Class 1-A and 1-B. Many members love Yoichi Isagi's airheadedness. They constantly think he is cute. They are always on Yoichi Isagi's side and want to be acknowledged by him. They don't judge by hearsay; they report exactly what they see. They feel disgust toward Riara.