Shiho Manabe

Shiho Manabe was a former student of Class 1-C.

Appearance
As Shiho's appearance is only depicted in the manga, she has shoulder-length bright-colored hair that is tied into pigtails on two sides and light-colored eyes or dark-colored eyes.

She is always seen wearing the female school uniform.

Plot
Shiho was introduced in volume 4, where she got put in the Rabbit group in the Cruise Ship Special Test along with Kiyotaka Ayanokōji, Honami Ichinose, Kei Karuizawa, her classmate Mio Ibuki and others.

During the test, Shiho and her friends, Nanami Yabu and Saki Yamashita who were in the same group, had an altercation with Karuizawa, after the latter was accused of shoving their friend Rika and was demanded of an apology. Karuizawa feigned ignorance and used Machida from Class A as a shield, which further pissed Shiho off. After one of their group meeting, Shiho and her group dragged Karuizawa into the emergency stairs and confronted her about the incident with Rika. Since Karuizawa was still being stubborn, Shiho lost her patience and they began making physical threats. At this point, Karuizawa started having unusual behaviour from her arrogant self by cowering herself and having ragged breathing. They then grabbed her hair and pulled her up and threatening her, which made Karuizawa become shaken. However they were interrupted by Teruhiko Yukimura and Kiyotaka who had been secretly watching them. Shiho and her friends decided to leave but warned the two guys not to tell anyone about what happened.

Later on, Shiho received anonymous messages, which were from Kiyotaka, about their feud with Karuizawa and was suggested on how to get revenge on her. She and her group, including Rika, then met Karuizawa who was lured into the ship basement and started taking out their anger by beating her up and left. However, their actions were recorded by Kiyotaka.

In volume 5, after the end of the Sports Festival, it was revealed that there was a traitor in Class C who had recorded Kakeru Ryūen's plan on winning the festival and sent it to Class D. As it turned out, Shiho has been secretly blackmailed by Kiyotaka to be the traitor and she was found out by Ryūen in the next volume. She began trembling with fear when being confronted by him about it but was forgiven afterwards and told Ryūen about the events happened on the cruise ship.

In volume 10, as Ryūen was in the danger of being expelled due to seemingly having the lowest votes from his class, Ibuki and Ishizaki asked Kiyotaka for help to save him. The night before the voting, Kiyotaka arranged for Ibuki, Ishizaki and Honami to meet at his room. They collected over 5 million points from Ryūen and Shiho was chosen as the target to save him, with the help of Hiyori Shiina. Kiyotaka asked Honami to tell her class to give all of their praise votes for Ryūen. In exchange, Ibuki will fill the private points that class B were missing to save a student from being expelled, with Kiyotaka acting as a witness.

As a result, Shiho received the lowest amount of votes and she was expelled from the school.

Etymology

 * The name Shiho means "will, purpose" (志) (shi) and "protection" (保) (ho).
 * Shiho's surname Manabe means "real, genuine" (真) (ma) and "pot" (鍋) (nabe).