Potions professor at Hogwarts, ex-Auror

Tall, medium-length black hair, light beard, brown eyes.

A scar on his face runs across his right eye.

A long scar runs the length of his right leg; he limps due to this injury.

Perfectionist, gruff, insightful, frank, unfazed and can't stand fools and idiots.

However, he is protective of his students and Hogwarts.