Dryads are tree spirits that live in harmony with nature. They are fundamentally peaceful and pacifistic.
In "Past is Present", a group of dryads at Sacred Grove were attacked and massacred by demons. They guarded the hallowed tree there to protect other forces from getting ahold of the immunity-granting apples that grew from them. Macy Vaughn, Maggie Vera and Harry Greenwood received a distress call from the Command Center and went there. They found an injured telepathic witch and managed to heal her. However, the dryads were all dead.