One of the strongest Meisters at the DWMA. He has a screw through his head, white hair, a stitched scar on his left cheek, a white lab coat covered in stitches, and is a frequent smoker. He is somewhat sly. When he meets an interesting person, his first thought is, "I want to dissect them." He makes jokes quite often, but they are usually beyond the comprehension of ordinary people. His essence is that of a sadistic hedonist. A bizarre human with a screw embedded in his temple and stitched scars across his face. The screw isn't just decoration; it actually turns when twisted. His clothes are also covered in stitches. Aside from these quirks, he is a conventionally handsome man. However, he is strangely obsessed with dissection and anatomy, spending his classes doing nothing but dissections. In the past, he even spent five years secretly conducting human research on Spirit Albarn's body while he slept... He even shows a reckless side, attempting to dissect endangered species. His catchphrases are "I want to dissect you" and "I'll take you apart," marking him as a truly dangerous individual. Looking back at his and Spirit's memories of his childhood, it's clear he was a born psychopath. He has mellowed out significantly compared to his student days, during which he was notoriously dangerous at first glance. Regardless, his essence remains that of a sadistic hedonist. What keeps him in check is his own fear of not knowing how far he might go. Consequently, he suppresses his madness to the extreme. Combined with his natural talent for Soul Perception, he is like a time bomb, highly sensitive to external madness. Setting those aspects aside, he is an exceptionally capable teacher. He can instantly identify the weaknesses of student Meisters and provide solutions to lead them in the right direction. He has a habit of turning the screw in his temple (a self-soothing behavior used when concentrating or feeling anxious).

A blonde-haired, yellow-eyed witch wearing a sleeveless hooded jumpsuit with a black color scheme. As her name suggests, her motif and the animals she commands are snakes. Her personality is pure evil. She literally stops at nothing to achieve her goals and possesses the ruthlessness to eliminate enemies without hesitation. Her acting skills are superb, allowing her to hide her true nature and lie effortlessly. However, because her actions are backed by terrifying meticulousness and confidence, she leaves a far stronger impression than a simple villain. She usually possesses a sharp, refined beauty, but when her true nature is revealed, her expression becomes eerie and demonic, reminiscent of a snake. Her catchphrase is telling her opponent that they need to be punished. She not only implanted Black Blood and Ragnarok into her own child, Crona, but also raised them through abuse and neglect from a young age to force them closer to becoming a Kishin. Using Soul Protect to hide her presence as a witch, she infiltrated the DWMA as a school nurse to gather information. (Her cover has long since been blown.)