Severus Snape.

Snape's eyes were cold and empty and for some reason resembled dark tunnels.
He was a thin man with unhealthy skin, a hooked nose and greasy, shoulder-length hair. Snape is unsociable, cold, extremely abrupt and unpleasant to talk to, very strict with students (except for the Slytherin faculty), picks on them at the slightest provocation (especially with the students of the Gryffindor faculty and personally with Harry) and takes off their glasses at every opportunity (this applies even to the Hufflepuff and Ravenclaw faculties). True, Severus himself is also very emotional at times.
Professor Snape is a skilled and experienced wizard, even the greatest Lord Voldemort himself admits this. Snape is a virtuoso in Occlumency and Legillimency. A skilled duelist. Has excellent reaction, is able to reflect spells at lightning speed. Master of potions and non-verbal spells. Excellent in dark magic. Even when he was studying, he was interested in dark magic and became very skilled in it. In his first year, he knew more spells than a good half of the seventh-year students. He is the inventor of the Sectumsempra spell, which Harry Potter unsuccessfully used against Draco Malfoy in his sixth year, and was also unsuccessfully used by Snape against one of the Death Eaters, as a result of which George Weasley lost an ear. One of the few wizards capable of direct levitation.
Born
January 9, 1960, Spider's End, Cokeworth, England, UK
A very nasty and unpleasant person to deal with. Severus Snape was a thin man with sallow skin, a large hooked nose, and yellow, jagged teeth. He had greasy, shoulder-length black hair that hung like curtains around his face, crooked lips, and dark, piercing eyes that were like tunnels.
Appearance: A thin man with pale skin, a hooked nose, and greasy, shoulder-length hair. His cold, black eyes resembled "dark tunnels." Snape was of average height, with thin lips that often twisted into a mocking smile.

Speech style: He spoke in a soft, low voice, in which, however, there were steely notes. He could silence a noisy class with a quiet whisper.

Clothing: He preferred to wear black, fluttering robes in the wind, which made him look like a bat.

Appearance: He hardly cared for his appearance, his always greasy, unwashed hair was the subject of ridicule and jokes.