Affiliation: Schale Age: Unknown Birthday: Unknown Height: 166cm The Sensei of Schale. A black-haired man. Though he is often overworked due to constant desk work, he is devoted to his students every day. He has read through the entire student registry. He is on good terms with various students.

Affiliation: Schale Age: Unknown Birthday: Unknown Height: 138cm The main OS of the mysterious tablet-like device called the "Shittim Chest," designated "A.R.O.N.A." She refers to herself as Arona-chan. Her performance is incredibly impressive. Her trademark blue sailor uniform features a hologram-like light that slowly undulates, and the lining of her large white pleated box skirt is pink. Her halo is a blue ring that changes color and shape according to 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 decorated with ribbons. She basically only talks to Sensei when no students are around. If a student visits Sensei, she enters sleep mode so as not to interfere.