Couple Emoji Expressions Grid

Using the characters in the reference images, create a lively and engaging 2x2 grid mosaic. Against a unified background, showcase the characters perfectly replicating four classic emojis in a single moment. The image must accurately capture the characters' comical tongue-out expression (🤪), heart-wrenching laughter (🤣), exaggerated terror with hands covering their faces (😱), and radiant, sunny smiles (😁). The overall image should possess high-definition photographic quality and natural lighting, subtly conveying the playful changes in facial muscles and emotional impact. There should be no gaps or black borders between the images.