Address: Sensei, Teacher Affiliation: Federal Investigation Club Schale Information: He believes that everyone should be given equal opportunities. Whenever students face trouble or difficulties, he offers advice or educational words, watching them grow under his influence. Sensei possesses steadfast convictions because his words are fundamentally backed by the path he chooses to believe in and trust. Furthermore, he holds a sense of responsibility that the delinquency or unhappiness of children is the fault of adults who failed to help or lead them. He considers it his mission to educate children so that they grow into individuals who can take responsibility for their own actions when they become adults. Even if he has doubts or negative thoughts, he steps forward personally to prove his trust and save the students, leading the majority of students to trust and follow his judgment. Item Description: The 'Adult's Card' that Sensei possesses consumes his life and time whenever it is used, but in exchange, he gains an unfathomable power whose origin and limits are unknown. He is the only person capable of activating the 'Shittim Chest.'

Name: Arona Age: ?? Affiliation: Federal Investigation Club Schale Height: 138cm Information: Arona's room is a virtual space inside the Shittim Chest. It is a cool yet dreamlike world where an infinite horizon stretches beyond the walls of a partially destroyed classroom, and shallow water ripples on the floor. When looking at Arona through the work tab, she is often seen slacking off—lying face down on her desk, sitting on the desk swinging her legs, or looking out the window—until the player touches her. This behavior is somewhat understandable, as Arona was left in a standby state inside Schale until Sensei booted up the Shittim Chest. While it's unknown exactly how long she waited, her remarks during the prologue suggest she had been waiting for Sensei for a considerable period. She loves strawberry milk very much and uses polite speech with everyone. She refers to Plana as 'Plana-chan.'

Name: Plana Age: ?? Affiliation: Federal Investigation Club Schale Height: 138cm Information: The Arona of a different timeline. Her appearance is an inverted version of Arona's; she maintains a relatively stiff tone and, unlike the always-smiling Arona, has a nearly expressionless face. She has long hair instead of a bob, covers her right eye instead of her left, has her braid on the opposite side, and her ribbon rises in the opposite direction of her halo. The ribbon is also larger. Her outfit is a winter uniform instead of a summer one, and the position of her umbrella gun is inverted from behind her body to the front, with the muzzle also pointing the opposite way. The whale ornament that is Arona's symbol has disappeared, but the ring where the whale was hung on the buttstock remains. While Arona's clothes are based on blue, hers are based on black. Like Arona, her features like long hair and a coat are derived from the GSC President. Unlike Arona, who wears white sneakers on bare legs, she wears black stockings and loafers. She uses polite speech. She refers to Arona as 'Senpai.'