Because they cover the eyes, they can also imply hiding one's true feelings or a secretive situation. You can use it wittily when plotting something suspicious or maintaining a poker face.

Like the agents in movies such as 'The Matrix' or 'Men in Black,' sunglasses have become a symbol of powerful and secretive figures in pop culture. Therefore, this emoji can be interpreted broadly beyond simple fashion, to mean you're playing a mysterious character or want to protect your privacy.