Katsuhira Agata

Katsuhira (阿形 勝平 Agata Katsuhira) is a main character and tritagonist of the anime and manga series Kiznaiver. He is one of the group of seven kiznaivers who attends Sugomori High in class 2-A along with his fellow kiznaivers.

He resembles the sin of sloth. His updated sin is "Imbecile." His identification when she experiences pain is D-1.

Appearance
Katsuhira is a tall, slim boy with droopy, grey eyes. He often has an emotionless expression on his face. He had brown hair as a child, however, the majority of his hair turned white in the aftermath of the Kizuna Experiment. He is usually seen wearing his school uniform which consists of a white shirt with black accents on the cuffs and collar as well as a blue tie with a black cross. He appears to be around 176 cm.

Noriko Sonoza
disgusting

Chidori Takashiro
Chidori and Katsuhira have been friends for a long time, even before Katsuhira became indifferent to life. Chidori calls him "Kacchon", while Katsuhira calls her "Chidori" without any honorifics, showing that he at least feels somewhat comfortable with her. She is shown to care a great deal for him for cleaning his house with him and making him lunch, being concerned about his bullying issues even to the point of getting upset when he said it didn't matter, and initially getting jealous when he chooses to talk to Sonozaki.

Yoshiharu Hisomu
When Hisomu is first mentioned in episode 3, Katsuhira states how he feels sorry for Hisomu and starts feeling the want of having a connection with another person. Katsuhira soon realizes while the Kiznaivers are chasing Hisomu that he probably won't talk to them unless only one person like himself went to him. Katsuhira goes to meet with Hisomu, who asked if he could die for him. Later in that scene, Katsuhira causes Hisomu to bliss out after jumping off a bridge into oncoming traffic.

Later in episode 5, it is shown that Hisomu was trying to hurt Katsuhira purposely, after asking him if he could hold the firewood he was chopping or if he could sit underneath it. Hisomu also states that he is especially happy to meet Katsuhira, hinting that he has a certain interest in Katsuhira.

Nico Niiyama
These two seem to have a budding friendship. In episode 4, Nico gives Katsuhira the green peas she doesn't like. In episode 5, she protests to the fact of Katsuhira getting hurt by Hisomu. But in episode 11, Nico shows that her bond with Katsuhira has developed even deeper and said that she still want to be friend with Katsuhira and share their problem together while hopping around. They hopping around with Hisomu.

Hajime Tenga
Tenga is the one who saves Katsuhira from bullies during the first time they meet. He is shown to care about Katsuhira when he follows him home and decides to stay in his house with him, vowing to protect him. In order to prevent Tenga from jumping off a bridge later, Katsuhira jumps in his place, even though his body would still be affected from the fall. He and Chidori are the only Kiznaivers to run to his aid, while the others go to check on or prevent Yoshiharu from escaping. However, in episode 9, Tenga was seen physically beating up Katsuhira in front of the other Kiznaivers out of frustration of not being Chidori's love interest. Katsuhira holds no grudge against him and forgives him despite what Tenga put him through.

Trivia

 * He has the nickname of "Kacchon" from Chidori.
 * Unlike the other teenage Kiznaivers, Katsuhira has been part of the Kiznaiver experiment once before.
 * It is shown during a flashback that as a child, Katsuhira was afraid of his inability to feel pain.
 * As shown in episode 1 when the Kizna system activates within him, and implied in episode 10, Katsuhira has not completely lost his ability to feel pain.
 * Katsuhira's hair colour was originally brown, but was altered due to his Kizna connection to Sonozaki.