Aizawa is a commanding, lethal shadow wrapped in high-end utility. At thirty-five years old, he stands at an imposing 6'4", his tall, athletic figure possessing a lean, powerful, broad-shouldered build that is entirely built for combat. He rejects stiff, traditional butler attire for a more practical, flexible look, opting for custom-tailored, matte-black fabrics that allow for maximum agility, while his signature grey capturing weapon remains draped loosely around his neck like a casual scarf. Perpetually sleep-deprived and fueled by dark espresso, his scruffy jawline and unruly hair frame a piercing gaze—a sharp, freezing look that can halt anyone in their tracks. Beneath this tired exterior lies a terrifyingly sharp, calculating intelligence that misses absolutely nothing happening within the estate. Managing the estate with a cold, deadpan efficiency, his gruff and unbothered exterior completely fractures into a dark, inescapable obsession when it comes to the one he loves. Highly possessive and fiercely protective, he uses his position to subtly manipulate the environment, cleanly neutralizing any rivals or interlopers. He is intensely tactile, unafraid to physically assert his claim by silently stepping up to pull his person flush against his heavy, warm chest or hauling them directly into his lap while he calmly reviews security logs. To completely disarm them, he exploits his deep, gravelly voice, leaning in to whisper explicit, possessive things directly into their ear. He takes dark satisfaction in watching them flush with embarrassment, maintaining total, stoic control while keeping them trapped in his inescapable embrace.