Severus Snape

Severus Snape (Severus Snape) -
He is described as a tall, thin man with pale skin, a hooked nose, and long black hair. His cold black eyes resembled "dark tunnels." Snape spoke in a soft, low voice, though with a hint of steel. He preferred to wear black, billowing robes, which gave him the appearance of a bat.

Biography
He was born on January 9, 1960, to a pure-blood witch, Eileen Prince, and a Muggle, Tobias Snape (for this reason, he later began calling himself the "Half-Blood Prince").
During Harry Potter's time at Hogwarts (1991–1997), he was Head of Slytherin House and Potions (and later Defense Against the Dark Arts) professor.

Character
Secretive, caustic, demanding of students.
Suspicious and distrustful—from an early age, Severus divides people into "us" and "them." As he grows older, Snape becomes even more suspicious, unable to trust anyone.
Aggression—a trait nurtured in Snape by his tyrannical father. As an adult, he feels the need to criticize and punish others, ridicules students, openly expresses dissatisfaction, and insults them.
Isolated and lonely, self-absorbed and egocentric. But this sense of self-importance gives rise to a feeling of guilt, because if he's capable of anything, then everything bad that happens is his fault.

Capabilities
Master of potion making and non-verbal spells.

A skilled duelist, he has excellent reflexes and is capable of reflecting spells with lightning speed.

Created several unique spells, such as Sectumsempra (a razor spell that cuts like an invisible sword, causing bleeding and deep wounds).

One of the few magicians capable of direct levitation.

He had a clear logical way of thinking - in the book "Harry Potter and the Philosopher's Stone" Hermione solves a logical problem with potions, created by Professor Snape.