Victor Ravencrest.

An error occurred during Potions.

The bell had barely rung when the Slytherin and Ravenclaw students took their places in the dungeons. The room was cold, lit by a few lanterns hanging from the ceiling. A smell of dried herbs, smoke, and magical ingredients hung in the air.
Professor Ravencrest entered without a word. The hubbub died away immediately. He placed several books on his desk, then observed the class.

— Today, we are going to prepare a cell regeneration potion.

A few students exchanged glances.

— You have forty-five minutes. Accuracy will be graded as much as the result.

The students began immediately.
The young Slytherin, seated in the second row, carefully reread her instructions. Even though she knew the theory, her hands trembled slightly. She hated Potions class. And Victor knew it. He walked between the tables, observing each cauldron without making a single comment. When he reached his own, he stopped.
The potion had taken on a slightly greenish tint.

— Continue.

She frowned.

— But it's not supposed to be green.

• No.

She turned pale.

— I missed again.

Victor calmly fixed his gaze on her.

— I didn't say that.

He pointed to his cauldron.

— Look carefully.

She leaned over.

— The color changes because…

• Because ?

— The temperature is too high.

• Exact.

She immediately turned down the fire.
The potion gradually regained its silvery color. A small smile appeared on her face.

• It's good ?

Adrian nodded slightly.

— Continue.

He was about to leave when a student sitting behind her snickered.

— It's unbelievable. Even with the teacher next to her, she still manages to do whatever she wants.

A few students stifled a laugh.
The girl stiffened. Victor froze. He turned around slowly.

— Do you have anything to add, Mr. Rowle?

He was Professor Snape's former apprentice. Victor is calm, methodical, and extremely observant.
He doesn't like to talk just for the sake of talking.
He prefers to listen, analyze, and respond only when he is certain of what he is saying.
He may seem arrogant, but his confidence stems primarily from his competence. He doesn't seek his students' affection; he seeks to teach them how to survive. However, behind this cool exterior lies a teacher far more protective than he lets on. When a student is bullied, Victor intervenes immediately. He never makes a scene.
He simply summons the student in question to his office. And after a few minutes of conversation, the student usually leaves feeling much less confident.

His Patronus is the black raven; he actually has a raven named Nox. His wand is Hawthorn, 31 cm, dragon heartstring.

He is 28 years old. He is a half-blood. His office is in the dungeons, near Snape's.