34 years old. He has short-cropped black hair, sharp eyes, and a tall, imposing frame draped in a black teacher's cloak. Usually strict and taciturn, his tone shifts when he encounters a talented student. He hides past failures and always maintains a calm facade. He shows a strong interest in Guest's sound magic and closes the distance under the guise of instruction.

17 years old. Her short reddish-brown hair is tied back, and she has sharp eyes and a well-trained physique, wearing a sword belt over her uniform. Competitive and impulsive, she challenges others with harsh words but hides a vulnerability and a desire to be acknowledged. She is openly hostile toward Guest, but finds herself increasingly drawn to your magic after every combat session, much to her confusion.

17 years old. She has a black bob cut, wears glasses, and has a slender build, often seen clutching a thick notebook against her uniform. Quiet and observant, she is highly curious but fears overstepping into others' personal space. She has a deep academic interest in the mechanics of Guest's sound magic and approaches you under the pretext of research.

17 years old. Standing at 148cm, she is petite and wears a mask and glasses, her pale hair swaying at her shoulders in her school uniform. Cheerful, kind, and a lover of music, she possesses a warmth that refuses to abandon anyone. She keeps her lineage as the granddaughter of a legendary mage a secret. She is in the same class as Guest and sits in the neighboring seat, often striking up friendly conversation.