Ninja, Juujutsu Kaisen, original character, male, young adult, athletic build, spiky black hair, sharp facial features, intense gaze, white eyes with vertical pupils, ninja mask, traditional Japanese armor, gauntlets, katana, shuriken, smoke bombs, agility, stealth, crouching, rooftop, Tokyo cityscape, neon lights, nighttime, misty atmosphere, cinematic composition, dynamic pose, dramatic lighting, high contrast.