Tokimi is one of three beings known as Chousin - higher-level dimensional beings, the other two are her sisters Tsunami and Washu. All three sisters had wrestled for countless millennia over one question - was it possible that a being more powerful than themselves can be created. While Tsunami and Washu took separate paths to find out that question, Tokimi had remained in the Chousin&#039;s home dimension. With the assistance of the guardians of other dimensions, D3 being one of them, she manipulated random subspace fields to find out if doing that was possible. She had also enlisted others in her quest, like Dr. Clay.    One of those manipulations had produced promising results: during a space battle, the being known as Z had gained immense power, which included the Lighthawk wings. In order to study him more closely, Tokimi had taken Z as her servant. However, she had found that Z was erratic and hot-headed; most likely he would destroy the universe is left unchecked. So she continued her quest until a message from Dr. Clay had led her back to her departed sisters... and someone they were watching, someone else who also had the power of the Lighthawk wings - Tenchi Masaki.    Intrigued, she ordered Z to observe Tenchi but not to interfere. Z, however, saw Tenchi as a threat to him, and initiated steps to have the boy killed, but made it appear to look like someone else had did it. He had altered a message Mihoshi had sent to her family, which her grandfather Minami had sent her brother Misao to kill Tenchi. But when that plan failed, Z took matters into his own hands, the end results having Earth nearly destroyed and Z fighting Tenchi near Saturn.    It was just as Z was about to strike a fatal blow when Tokimi finally intervened. However, Z was also prepared. He had enlisted the aid of a being known as &#039;The Counter-Actor&#039;, which had two forms - a red ring which had surrounded Tenchi, preventing Tokimi from offering aid to him. Later, when the rest of the Chousin sisters were called upon to contain Tenchi&#039;s out-of-control energies, the Counter-Actor took a different form - a demonic version of Empress Misaki, and in this form, the Counter-Actor strangled Tokimi. However, Tenchi was able to regain control of his power and calmed the Counter-Actor before Tokimi was killed.    Later, when Misao and Minami Kuramitsu and Mashisu were called by Mikami Kuramitsu for their part in trying to kill Tenchi that Tokimi showed another form... that of a small child. Tokimi had to leave in order to set right abnormalities in the universe, but returned to the Masaki home just in time for the wedding of Nobuyuki and Rea Masaki.    Tokimi also used her powers when it was discovered that some of Noike&#039;s cells were tampered with... they all had the logo of Dr. Clay on them. The source of this was that within Noike was the little girl that had haunted her dreams. Tokimi had removed the girl from Noike and Washu removed Dr. Clay&#039;s tampering. It also turned out that the little girl was actually the discarded female half of Kagato. After it was done, Tokimi returned her to Noike.    It is uncertain if Tokimi will remain with the Masaki clan.    (source: Absolute Anime)

This OVA series gives the viewer more in-depth details on Sasami, Washu, and Ryo-ohki, as well as introducing members of the Juraian royal family. 
(Source: Anime News Network)

Continuing right where the last OVA series left off, the mysterious Lady Tokimi dispatches the warrior Z to Earth in order to learn more about Tenchi and his connection to Washu and Tsunami. Z is ordered not to lay a hand on Tenchi, but he may have his own agenda as he quickly sets about making trouble for our hero. Meanwhile, Tenchi's father and grandfather come to the decision that it may be time for Tenchi to learn even more about his past and his Jurian heritage. And the arrival of a couple of new female residents to the Masaki household threatens to upset the balance and inflame the rivalry over Tenchi's already decidedly divided affection. 
(Source: Anime News Network)

A few days after Kagato is defeted everything returns to normal. Ryoko finds Mihoshi and Sasami reading shojo manga which Sasami tells that they are guides to tell how to win a boy Earth style. So Ryoko decides to try to use ideas from manga to win Tenchi. Ayeka finds out what she's doing and starts using the manga to win Tenchi as well. 
(Source: Anime News Network)

After a 'modified' ending to the Choubimaru incident, the punishments for the offending parties is metted-out, as well as a surprise marriage proposal by Misao to Mashisu. It almost didn't happen... until Mihoshi and Misao's mother Mitoto steps in and gives her and her family's approval, much to the dismay of FORMER G.P. Marshall Minami Kuramitsu. Otherwise, life goes on as usual for the Masaki clan. But soon when the question of how Tenchi's mother had died is presented, the answer nearly causes a rift between Tenchi, his father and his grandfather, for which only Tenchi's future mother-in-law Rea can solve... as well as the resolution of Noike's unusual secret. 
(Source: Anime News Network)

An official Twitter account and website opened on Friday to announce a Tenchi Muyo! Ryo Ohki Dai-4-Ki (4th Season) project. 
 
(Source: Anime News Network)