Gyokuen Ren

Gyokuen Ren (練玉艶, Ren Gyokuen) is the wife of the two former Emperors of the Kou Empire and also a member of the organization, Al-Thamen. She is now the third and current Emperor of the Kou Empire.

Appearance
Gyokuen is an average height slim woman. She has blue eyes and long black hair that extends past her shoulders, with some hair tied in loops on the sides. She has thin eyebrows, a beauty mark under her lips, and wears lipstick. She wears a small hat and a royal dress that resembles the clothes her children wear.

Personality
In Hakuryuu's memories, Gyokuen appeared as a very gentle caring mother, protecting and showing great care towards Hakuryuu Ren and Hakuei Ren after they survived the survived a fire that killed their father along with Hakuyuu Ren and Hakuren Ren. Later, she started to show her devious and deceitful side; creepily smiling while crying as she is appointed the Third Emperor. As mentioned by Hakuryuu, Gyokuen is a woman that cares nothing about her children, she is willing to do anything to gain and maintain power - going as far as to kill her own children and husband.

History
When Sinbad was born, Gyokuen, Scheherazade, Matal Mogamett and Yunan sensed the strong resonation of rukh. Yunan comments that the rukh is resonating with a great power.

Gyokuen, with her first husband, Hakutoku Ren, had four children (from oldest to the youngest): Hakuyuu Ren, Hakuren Ren, Hakuei Ren and Hakuryuu Ren. Her first two sons and husband died in fire fighting against the Al-Thamen, whose members were probably sent from Gyokuen herself. After her husband's death, she later married Hakutoku's brother, the Second Emperor, Koutoku Ren.

Pirates Arc
Gyokuen is seen in Hakuryuu's memories. The first memory shows Hakuryuu crying after he had a nightmare. Gyokuen calms him and says that he does not need to be worried because his father is an incredible person and unified three countries for the sake of the people. When her husband and two of her sons died in the fire planned by herself, Koutoku Ren is appointed as the Second Emperor of the Kou Empire. Displaying a depressed face, Gyokuen explains to Hakuei and Hakuryuu that she will marry Koutoku and they will be able to live as Imperial Prince and Princess. Then Hakuei tries to comfort her.

In another memory, Hakuryuu asks her about if she really killed his brothers and father, since her oldest son had told him that before he died, but Gyokuen only smiles and says that even if it is true he is powerless and can not do anything.

World Exploration Arc
Gyokuen is with her deceased second husband when her children come to their side. She greets and tells them to come closer. Kouen then ask if the Emperor had died of an illness, she says yes and also tells them to come say farewells to their father. She hugs Kouen and says that she only has him left and if he will support her, but Kouen pushes her back. After this, she is appointed the next Emperor. When everyone makes a ruckus, she says it is an unavoidable measure and, as Kouen is the General Commander and can not be removed from that important position, he can not be next Emperor until the continental subjugation is complete. Hakuryuu and the priests then bow before her and ask that she takes the throne.

After the funeral, Judar confronts Hakuryuu about whether the prince is still being controlled by Gyokuen, his mother. Judar says that Hakuryuu has become strong, and that he wishes to show this power to her. When she appears with the priests, Gyokuen says to Hakuryuu that Judar has been praising him so much and, for that reason, she has been wanting to speak with him for a while now. She approaches Hakuryuu, asking to see his face and touch him, but Hakuryuu pushes her hand back. Then, she says that Hakuryuu's eyes have gotten sharper and he has the same eyes as Hakuyuu and Hakuren and, maybe like them, she should kill Hakuei too. Hakuryuu gets angry and attacks Gyokuen, but he quickly loses as she used a very powerful Borg even though Hakuryuu used full Djinn Equip. After this, Gyokuen pats his head and says may he always remain as her cute, little Hakuryuu.

Magnostadt Arc
In Magnostadt, the furnance of Black Rukh doesn't need Matal Mogamett as an intermediary anymore. It has seemingly become independent, but then restarts to absorb magoi. Mogamett asks it why its still absorbing magoi, as it only desired magoi to create Black Djinn from the black miasma. He notices that someone is at the other end of the tunnel and asks who it is. The tunnel leads back to the Kou Empire, with Gyokuen sitting on the throne. Black things are coming out of the tunnel, and she smiles in tears and says: We finally meet... "Father"!.

Magic
She is proficient in using Black Rukh.

Borg
 * This is said to be the proof of a Magician. It is a defensive ability. It blocks out attacks with evil intentions. It also blocks out all physical attacks and magical attacks to some degree. It's strength, however, depends on the person. Gyokuen Borg uses Black Rukh. Gyokuen's Borg is strong enough to push back a Full Djinn Equipped Hakuryuu Ren.

Trivia

 * Her name means Charming Jewel in Japanese.
 * Her youthful appearance is artificial.