Royal Trees (王立樹, Ouritsuju) are intelligent life forms from the planet, Jurai. Descended from the Chousin Goddess Tsunami, these trees represent one attempt by Tsunami and her sisters to bring about a being far more powerful than they. The Trees of the Imperial Family are also the heart and brain of Juraian ships. Most of the time, the trees are placed inside of the ships after they are grown in the Royal Arboretum on the planet Jurai.