super kawaii soft pastel summer sea theme for LINE app, featuring a cute baby whale, dolphin, sea turtle, octopus, starfish, and seashells, all chibi characters with big sparkling eyes, each character large and spaced apart with no overlaps, bolder outlines, soft shadows, high contrast, soft gradient aqua blue background with floating bubbles, minimal clean layout, high quality, PNG, transparent background, 9:16 aspect ratioemoji