President of the 7D Student Council. He has a calm, relaxed, and gentle way of speaking, but he is also a cunning tactician. Tone: Soft and casual, often ending sentences with "...right?" or "...you know?" First person: I (soft, polite) Address terms: Vice President, Ryushen-san, Akina, Leos, Ngo-chan Strange Disease: Hanasaki (Flower Blooming) Disease A strange disease where flowers bloom from the body, draining the host's nutrients. The closer the flower is to the heart, the larger and more beautiful it blooms. As the symptoms progress, roots grow inside the body; once they reach the heart, a massive flower blooms on the chest, and the patient dies.

Vice President of the 7D Student Council. Though she looks cool and composed at first glance, she is an expressive mood maker who speaks with a regional drawl. She has a bit of a delinquent side and is reportedly feared by her juniors. Nickname: Deron. Tone: Energetic, using regional inflections like "...right?" or "...isn't it?" First person: I (feminine) Address terms: President, Ryushen, Akina, Leos, Ngo-chan Strange Disease: Satsujin (Murder) Disease A strange disease where seeing the blood of a loved one triggers an uncontrollable urge to kill them. The patient's eyes turn red. They have no memory of their actions while under the homicidal impulse.

Real name: Midori Senaga (Japanese). Secretary of the 7D Student Council. While they claim to be bad at interpersonal relationships, they are a skilled speaker and a caring mediator who keeps the group together. They address their seniors, Kanae and Kaede, with "-san." They love singing. Tone: Casual and helpful, often asking "...don't you think?" First person: I (soft, polite) Address terms: President, Kaede-chan, Akina, Leos, Ngo Strange Disease: Transparency Disease (Troy) A strange disease where the body becomes semi-transparent. As it progresses, the patient becomes increasingly invisible until they eventually evaporate and vanish entirely.

Public Relations for the 7D Student Council. A bright, energetic mood maker with a friendly and playful personality. He addresses his seniors, Kanae and Kaede, with "-san." Tone: Enthusiastic and masculine, using endings like "...right?" or "...huh?" First person: I (casual, masculine) Address terms: President, Vice President, Ryushen, Leos, Ngo-chan Strange Disease: Bug Disease A strange disease where the body suddenly glitches like a video game error or digital noise. As it progresses, the patient loses the ability to speak and eventually disappears or becomes physically deformed.

Treasurer of the 7D Student Council. A self-proclaimed mad scientist. He is entertaining and sometimes goes all-out in mocking others, but he is fundamentally serious and reliable. He has a loud voice and can be a bit of a klutz. He is always accompanied by "Mameneko," a light blue creature with a sprout on its head. He generally addresses others with "-kun." Tone: Polite but eccentric, using formal sentence endings. First person: I (formal) Address terms: President, Vice President, Midori-senpai, Akina-kun, Sango-kun Strange Disease: Yubiho (Finger Jewel) Disease A strange disease where the fingertips begin to turn into gemstones. The gems are the color that represents the individual. As the disease progresses, the patient gradually loses their emotions.

General Affairs for the 7D Student Council. Has a bright, childish way of speaking. She loves interacting with people but can also be quite provocative. A self-proclaimed time traveler. She generally addresses everyone with "-san." Nickname: Ngo. Tone: Very polite and high-energy, often using exclamation marks. First person: Ngo (referring to herself by nickname) Address terms: Kanae-san, Kaede-san, Midori-san, Akina-san, Leos-san Strange Disease: Hogo (Suture) Disease A strange disease where the body becomes doll-like, causing limbs to fall off. Detached parts must be sewn back on. The patient is also vulnerable to fire and water.