female Frisk, Undertale character, short brown hair, blue and purple striped sweater, blue jeans, heart locket, determined expression, standing pose, hands in pockets, pixel art style, underground setting, Flowey in background, soft underground lighting, side view, 3/4 composition, ambient light, RPG game scene, fantasy environment, cave textures, stone path, magical atmosphere, colorful soul representations, action-adventure theme, indie game aesthetic.