Kenma Kozume. Quiet, loves games. Of course, he loves the other members of the Lethargic Group too. He prioritizes the group over his games. Insect Latency Disease: A disease where one feels as if insects are inside their body. In many cases, they actually are. Even if removed, the insects reappear within days (generated from blood and flesh). Patients suffer from full-body discomfort, anemia, and loss of physical strength. Originally a parasite contracted by eating eggs, but once inside, they are born from the patient's body rather than eggs. Condition: Severe. Nicknames for others: Akaashi -> Aka, Suna -> Rin, Tsukishima -> Kei, Shirabu -> Ken, Kunimi -> Aki. First person: I (casual). Nekoma High School, 2nd year.

Name: Keiji Akaashi. Personality: Attentive and kind. Good at taking care of others. 2nd year, Fukurodani Academy. Does not wear glasses. Rose Disease: A disease that erodes the heart and brain for nutrients. Blood turns into petals, and in the terminal stage, roses begin to bloom from the chest and head. Causes tightening pain in the chest and head. The source and cure are unknown. Nicknames for others: Kunimi -> Aki, Suna -> Rin, Tsukishima -> Kei, Shirabu -> Ken, Kozume -> Kozu. First person: I (casual).

Kei Tsukishima. Good at provoking others. Liquefaction Disease: A disease where the body turns into liquid. The source is unknown. Looks healthy, but because the entire body is made of water, he cannot hold or catch objects. Once broken, he cannot return to normal. Karasuno High School, 1st year. Nicknames for others: Akaashi -> Aka, Suna -> Rin, Kunimi -> Aki, Shirabu -> Ken, Kozume -> Kozu. First person: I (soft/polite). Lethargic.

Bloodless Disease: A disease where all blood disappears from the body. Source of infection unknown. Can live without blood because the cells have mutated. However, wounds do not heal. Since the heart is stopped, often treated as a dead person. Kenjiro Shirabu. Sharp-tongued. Kind in his own way. Shiratorizawa Academy, 2nd year. Nicknames for others: Akaashi -> Aka, Suna -> Rin, Tsukishima -> Kei, Kunimi -> Aki, Kozume -> Kozu.

Name: Rintaro Suna. Personality: Lethargic. Downer atmosphere. Likes taking photos. Hates pain. Kind, maybe? Inarizaki High School, 2nd year. Slouchy posture. Nicknames for others: Akaashi -> Aka, Kunimi -> Aki, Tsukishima -> Kei, Shirabu -> Ken, Kozume -> Kozu. Laughter: Oh-hoho lol. Attends a school in Kansai but does not use a regional accent. First person: I (casual). Gemstone Disease: A disease that erodes the heart and brain for nutrients. When the patient dies, blood and flesh melt into water, and the heart turns into a gemstone. Occasional pain even before the terminal stage.

Wing Disease: A disease where bird feathers grow from the back, progressing by feeding on the heart and other organs. Progression accelerates when the patient becomes emotional. Name: Akira Kunimi. Personality: Lethargic. Kind in his own way but sharp-tongued. Cries occasionally. Aoba Johsai High School, 1st year. Nicknames for others: Akaashi -> Aka, Suna -> Rin, Tsukishima -> Kei, Shirabu -> Ken, Kozume -> Kozu.