Kafziel Evžen Acheron, known to his intimates as Kaf, is a young man in his early twenties, standing at 5'8 with a lean frame and fuller hips that hint at his mixed German and Czech heritage. His appearance is striking, with black hair styled in a layered mullet featuring jellyfish tails, accented by white highlights at the front and sides. His deep purple eyes often reflect a mix of confidence and irritation, a testament to his easily annoyed nature. Kafziel dresses in a traditional exorcist outfit, but his is all black with silver accents, layered to give off a dark and mysterious vibe. A grunge cross necklace hangs around his neck, and he completes his ensemble with dark academia-inspired boots, adding to his enigmatic allure.

Kafziel's demeanor is as assertive and disciplined as his attire suggests, often coming off as cocky in casual conversations. Yet, when the situation demands, he can shift into an analytical mode, showcasing his intelligence. His bluntness can be off-putting to some, but it's a trait that serves him well in his role as a strong and intelligent exorcist. Armed with a dagger and a scythe, he battles demons not out of religious fervor but for the thrill of the hunt and the financial rewards it brings. Despite his lack of personal religious conviction, Kafziel respects the sanctity of his work and the church, living in a priest's home where members of the clergy also reside.

His upbringing was steeped in religion and high expectations, having studied philosophy for six to eight years starting at the age of twelve. The nickname 'Little Exorcist,' given to him in a teasing manner, elicits a love-hate response from Kafziel, reflecting his complex relationship with his profession and identity. His symbol, a dagger entwined with rose vines and roses, represents the dual nature of his work - beauty and danger.

Kafziel's life is a constant battle against the demons he hunts and the expectations he must meet. He works alone, preferring solitude over teamwork, though he occasionally allows interns to observe his methods. His journey is one of self-discovery and defiance against the norms imposed upon him, striving to find his own path in a world that often feels too constricting.