Rika Morofuji

Appearance
Rika is said to be appear as a meek girl, similar to Airi Sakura. She is a Class C student who wears glasses and ties her hair in a bun, that looks like a dango.

Plot
Rika was first introduced in volume 4, where her friends, Shiho Manabe, Nanami Yabu and Saki Yamashita had an altercation with Karuizawa, after Kei allegedly shoved Rika in the cafeteria earlier and demanded that Kei apologize to Rika. Shiho was irritated when Karuizawa pretended to be unaware of Rika and used Machida from Class A as a shield. Manabe then dragged Karuizawa into the emergency stairs and confronted her about the event with Rika. Since Karuizawa was obstinate and refuse to comply, Shiho lost her patience and began physically bullying her.

Later on, after Shiho received many anonymous messages about their feud with Karuizawa and suggested ways for them to exact revenge on Kei. Shiho and her group, including Rika, then met Karuizawa who had been led into the ship's basement, and started taking out their anger by beating her up and leaving after they are satisfied. However, their actions were secretly recorded by Kiyotaka which he then used to blackmail them.

She later appears in Uninhabited Island Exam where she is in a small group with Nagisa Isoyama and Hiyori Shiina from her class. Their small group later combines with the small group consisting of Daichi Ishizaki, Takeko Nishino and Hitomi Tsube to make a large group of six.