Fantastical airs are a special element of writing that bring a touch of whimsy, magical realism, and a playful tone to a story. Synonyms for this phrase could be "fanciful behavior", "whimsical gestures", "capricious mannerisms", or "playful expressions". Other possibilities include "eccentric antics", "imaginative behavior", "enchanting gestures", "magical postures", "surreal actions", or "whimsical appearances". Each of these phrases can be used to paint a vivid picture of characters who are not bound by reality, stepping outside the norm to bring magic and wonder to their world.