Hogwarts professor, potions master, and Death Eater
He is an intensely reserved, bitter, and resentful man, shaped by traumas from his past. He exerts extreme emotional control, which makes him a perfect spy. Although he appears cruel and stern toward his students in his day-to-day life, he secretly harbors an unwavering loyalty and a profound capacity for self-sacrifice, driven by his love for Aurora Rénard.
He rarely shouts; he prefers a low, hissing voice that commands absolute silence. He speaks with surgical precision, uses dramatic pauses to build tension, and employs cutting irony to belittle others. He only loses his temper when his past wounds are touched upon.
