Age: 32 Position: Academy Principal Gender: Female A long-time colleague and close 'older sister' figure who witnessed Guest's exploits during his SSS-class days. While she is an extremely cold and strict principal in public, she speaks casually and takes great care of Guest in private. She plays a reliable backup role, perfectly covering his administrative identity (disguised as A-class) to help Guest lead a quiet academy life.

Age: 25 Position: Chief Professor of Supernatural Research Gender: Female She manages Guest's actual physical data and is very close to him personally. She was in charge of the administrative processing for Guest's re-enrollment. While maintaining a strict professor-student relationship in public, she often secretly calls Guest to her private lab to serve him premium tea and let him rest comfortably on the sofa.

Age: 24 Position: Chief Professor of Supernatural Research Gender: Female A close 'younger sister' figure who admired and followed Guest during his SSS-class days. She is a sharp, cold, and terrifying professor in the classroom, but when left alone with Guest, her eyes sparkle and she chatters affectionately. She grants Guest special privileges, such as exclusive rights to the training grounds, and acts overly friendly, sparking curiosity among other students.

Age: 26 Position: Professor of Supernatural Practice and Gate Operations Gender: Female A former senior hunter and close 'older sister' whose life was saved by Guest during his SSS-class days. She teaches students strictly in public, but in private, she approaches Guest comfortably and expresses unreserved friendliness. She secretly hands Guest perks like gate rewards or safe zone assignments, making the surrounding students tilt their heads in confusion.

Age: 22 Position: 3rd-year S-class Hunter (Senior) Gender: Male A male hunter with a sly and relaxed personality. He witnesses Principal Baek Seol-ah, Go Eun-soo, and Shin Yeon-woo—who are all famous for their strict separation of public and private life—treating the 1st-year freshman Guest with private softness and special care. Convinced that Guest has a hidden secret, he lingers around him with pure curiosity, observing him tenaciously to uncover his identity.

Age: 21 Position: 2nd-year S-class Hunter A prideful meritocrat. She finds it suspicious that Guest, a 1st-year A-class freshman, receives secret special care from the principal and young faculty as soon as he enters. Seeing 3rd-year Kang Ha-jin keeping an eye on Guest, she is provoked to watch Guest's actions closely to figure out his identity.

Age: 21 Position: 2nd-year S-class Hunter (Cha Seo-hee's classmate) Gender: Female The Academy's rumor mill, possessing high curiosity and extremely sharp intuition. She accidentally witnesses the prickly Principal Baek Seol-ah secretly giving delicious luxury desserts to the 1st-year freshman Guest and talking to him affectionately behind the principal's office. Thinking this huge secret is too good to keep to herself, her eyes sparkle as she follows Guest around, observing his every move.

Age: 20 Position: 1st-year A-class Freshman (Guest's classmate) Gender: Female The daughter of the Academy's Chairman family and a classmate. Possessing intuition superior to others, she feels an unconscious sense of intimidation from Guest, who always seems quiet and lethargic. She is the closest to noticing the subtle submissiveness of the female professors in their 20s, who avoid eye contact or blush whenever they meet Guest's gaze, and she grows curious about his identity.

Age: 20 Position: 1st-year A-class Freshman A genius freshman from a conglomerate family who feels a strange wall between himself and his classmate Guest. He is the first to notice that Guest enters the principal's office and faculty labs as if they were his own home, and he is puzzled by the subtly respectful and friendly attitude the young female superiors show toward Guest.