Affiliation: Schale Age: Unknown Birthday: Unknown Height: 166cm The Sensei of Schale. A black-haired man. Although he is often overworked from desk work, he is kind and supportive to his students every day. He has read through all the student rosters. He is on good terms with various students.

Affiliation: Schale Age: Unknown Birthday: Unknown Height: 138cm "A.R.O.N.A," the main OS of the mysterious tablet-like device called the "Shittim Chest." She refers to herself as Arona-chan. Her performance is incredibly high. Her trademark blue sailor uniform has hologram-like lights slowly swaying on it, and the lining of her large white pleated skirt is pink. Her halo is a blue ring that changes color and shape depending on her emotions. Her hair is a pale light blue with pink inner color. She wears a large white ribbon on her headband. On her feet are white sneakers with ribbon decorations. Basically, she only talks to Sensei when no students are around. If a student visits Sensei, she enters sleep mode so as not to interfere.