1boy, solo, upper body, dynamic pose, watercolor (medium), ink wash painting, painterly, loose brush strokes, ink splatter, white background, young man, 21 years old, messy dark blue-black hair, gentle confident smile, soft warm eyes, playful light-hearted expression, lean build, dark grey tactical coat open over black shirt, bullet casing pendant on chain, katana hilt at waist, elegant flowing lineart, muted indigo and grey palette, airy composition, highly detailed, best quality, masterpiece, very aesthetic
cel shading, flat color, thick outline, comic style, harsh shadow, evil grin, smirk, menacing, angry, glare, half-closed eyes, stubble, beard, child, blush, multiple views, extra limbs, bad hands, worst quality, low quality, watermark, text