Frisk, Chara, Undertale fanart, side by side, determined pose, striped shirt, short brown hair, green and yellow striped shirt, heart locket, knife, red eyes, smile, combat boots, knee-high socks, underground, flowerbed, golden flowers, ruins, soft lighting, ambient shadows, close-up, dynamic angle, detailed texture, vibrant colors, emotional expression, action scene, digital painting style, high resolution, depth of field, dramatic contrast.