Fairies often symbolize a playful or fickle nature. So, it can be used jokingly to affectionately refer to a friend who acts unpredictably.

In the West, the image of a small, cute fairy like Tinkerbell is strong, but in Korea, it's sometimes seen as a mysterious being similar to a 'Seonnyeo' (a celestial maiden). It's often used with the expression 'like a fairy' to praise the ethereal visuals of K-pop idols.