Frisk character, Sans character, Undertale, friendly pose, blue jacket, striped shirt, shorts, sneakers, smiling, expressive eyes, cartoon style, bone, blue magic, heart locket, pixel art texture, underground setting, stone walls, glowing runes, ambient lighting, side view, dynamic duo, action scene, colorful, detailed background, torches, cavern, magical atmosphere, soft shadows, 3/4 view, digital painting.