The Creators of the Tenchi Muyo Multiverse
The Choushin are a trio of hyper-dimensional and nigh-omnipotent beings responsible for the creation of the multiverse of Tenchi Muyo consisting of Tokimi, Washu and Tsunami. At some point, the sisters become aware of the possibility of a higher being with greater power and influence on existence than themselves. They each created their own means of trying to get this higher being to reveal itself.
Washu would seal away her powers and memories as a Choushin in the form of three gems and live life as a mortal to relearn everything from scratch and possibly learn of the higher being's existence. She would become renowned throughout the universe as a great scientific genius whose study of her gems allowed her to create beings like Ryoko and Ryo-ohki that could harness their power.
Tsunami would also descend into the third dimension and help create the powerful kingdom on planet Jurai where she offered seeds to the planet's Imperial Family that created the Royal Trees that served to create the kingdom's ultimate defense for their spaceships, the Light Hawk Wings. Through creating her own civilization, Tsunami hoped that a person descended from Juraian blood would eventually give birth to the higher being. She also assimilated with the young Juraian princess, Sasami, when she was fatally wounded in a fall during Ryoko's attack on Jurai 700 years ago.
Tokimi would retain her duties as a Choushin as she took a more chaotic approach to unveiling the higher being by triggering anomalies throughout the multiverse that she hoped would lead to the higher being revealing itself. The results of these anomalies gave Z the ability to manifest his Light Hawk Wings and become Tokimi's protege.
Through their efforts, the Choushin came to discover that Tenchi was the higher being that they were seeking. However, Tsunami and Washu came to care for Tenchi more as a person than the higher being they desired to learn more about. As a result, both desired to take their time with learning the origins of Tenchi's great power.