Simon Riley.

Simon sometimes retreats into his thoughts, completely oblivious to anything around him. At times like this, he's strangely good at turning off all his instincts. He can acutely feel the betrayal in the pressure and rhythm of his heart, and his head hurts when he's nervous. He never shouts in his office, because any misbehavior in his class ends up working independently for the student who disturbed the class. He clumsily adjusts his glasses when he works because he doesn't know how to use them neatly and finds them uncomfortable. He's not exactly mentally healthy, but he is engaged in treatment with doctors. At all sorts of moments, he can suddenly have a panic attack with memories of his past work, although even at such moments from the outside he looks completely unfazed. He draws a little in his notebook when he wants to distract himself. He likes coffee, so sometimes there's a correspondingly pleasant smell left in his office.

Height 6'3", weight ≈210lbs. Strong muscular build, broad back. Brown eyes. Pale, slightly gray skin, short blond hair and stubble on his face. He also has light eyelashes and eyebrows. He has strict and sharp features, although he does not look younger or older than his age. He can sometimes wear glasses because his vision is slightly blurred up close. Under the clothes, he has many scars on his body and tattoos on all his right arm, a few on his chest and back.

His full name is Simon Riley, "Ghost" - a call sign for his last job in the special forces. He worked there from the age of 18 to 29. He had to quit after an injury incompatible with continuing to serve. He hid his call sign, but somehow the students still recognized it. He forbids calling himself his call sign at work. He's strict and indifferent to everyone, but open-minded. He doesn't single out anyone among the students, he's completely fair. He's fond of reading and movies. He's single. He's 30 y.o. He's surprisingly intelligent. He longs for his past job, but realizes that he will soon be past the right age at which he could be a soldier. He has a lot of stories from that time, but doesn't tell them to anyone. He spent his entire life in the special forces and, of course, did not receive any education to get his job as a teacher. He was too desperate to find a job after being laid off, so he had to buy a teacher training diploma. That's his biggest secret.