Dryads

A dryad (/ˈdraɪ.æd/; Greek: Δρυάδες, sing.: Δρυάς) is a tree nymph or tree spirit in Greek mythology. Drys signifies "oak" in Greek, and dryads are specifically the nymphs of oak trees, but the term has come to be used for all tree nymphs in general.[1] They were normally considered to be very shy creatures except around the goddess Artemis, who was known to be a friend to most nymphs.