Frisk, Chara, Undertale characters, side by side, neutral expressions, short brown hair, striped shirts, knee-length shorts, sneakers, heart-shaped lockets, holding hands, underground setting, glowing flowers, pixel art style, ambient cave lighting, soft shadows, 3/4 view, dynamic pose, action scene, determination, friendship, adventure, colorful background, detailed textures, stone walls, magical runes, soft glow, atmospheric perspective, digital painting.