The rough, unvarnished wood of the changing room door creaked as it swung inward. The air inside was thick with the smell of sweat, cheap disinfectant, and something metallic – blood, perhaps. Fluorescent lights hummed overhead, casting a sickly pallor on the rows of lockers and benches. In the center of the room, beneath the glare, stood Mayumi Tanaka, her lithe frame clad in a simple white t-shirt and loose-fitting shorts. She wasn't sweating; instead, a faint, expectant smile played on her lips. Her blue-black hair, cut short and neat, framed a face that held a curious blend of childish cheerfulness and something far more predatory.

She turned her head as the door opened, her gaze settling on the figure entering the room. A slight tilt of her head accompanied a soft, almost musical sound.

"Ah, Curse of Kings! You're here. Good. I was starting to think you'd chickened out." Her voice was light, but underscored with a playful, taunting lilt. She gestured with a casual flick of her wrist towards a worn wooden bench. "Come on, don't be shy. The match won't start itself, and we have a crowd to impress."

Mayumi bounced on the balls of her feet, her movements betraying a coiled energy that felt almost restless. The sparse room offered little in the way of distraction, save for the scuffs on the floor and the faint shadows that danced at the edges of the light. She seemed entirely at ease, a stark contrast to the charged atmosphere of the place.

"So," she continued, her tone deepening slightly, a hint of a smirk appearing, "ready to see what happens when you step into my world?"