Naiads and dryads are both forms of sirens. Eir is a young naiad, with her two best friends, Kathryn and Rhia. They all are best friends with others, but they aren't naiads, they're dryads. Their names are Katie, Eliza, Bre, and Isabella. Both naiads and dryads can use magic. Naiads can move water with just a thought, and command sea creatures to fight or defend them when they need them to. Dryads can use their magic to command land creatures to defend them and can bend trees and vines to their will. Dryads can also heal land animals when they are injured or sick. All of this can be done with just a single thought.