Ryouko Balta

She then turned the gun she planned to use to kill Seina on herself. But before she could pull the trigger, Amane Kaunaq and Kiriko Masaki (who were following Ryoko and Seina to keep an eye on them) barged in and stopped her. Ryoko was later captured by Airi; it seemed that a short time ago, Airi found out that Erma was really Ryoko but didn't have the evidence to prove it. At the same time, Kyo Komachi (with secret help from Airi Masaki) managed to free the families of Ryoko's crew.

At the same time, the families took with them a second-generation Juraian tree-seed, which the Daluma Guild had procured in the hopes of discovering its secrets However, as per procedure, Ryoko Balta's DNA was listed in the Galaxy Police's database, and in the process, it was discovered that her DNA was disguised. The reason for this was that, in-fact, she was the last heir to the Balta Guild, which stands to become a member of the Galactic Union. With help from Seto, she was released as a subordinate of Seina. After the group made it to Jurai, Seto revealed Ryoko's past to her... and Ryoko even got to meet her grandfather, the ruler of the Balta Guild.

But even though she was invited to come back home, Ryoko chose to stay with Seina. Ryoko then became a member of the newest ship in the Galaxy Police's fleet - the Kamidake II, which was created by Washu Hakubi. Mostly out of love for the boy, Ryoko, along with Amane, Kiriko - and later the child-like former priestess Neju Na Melmas - fought alongside Seina, which included rescuing Seina and Fuku when a rogue faction of the Galaxy Army - who were aiding Shank - tried to gain the secrets to Fuku's power. Later on, Ryoko, as well as Amane, Kiriko and Neju, were placed in an arranged political marriage with Seina.

However, before the ceremony could begin, Seina was kidnapped - and later publicly seduced - by Seto's ladies-in-waiting, who were really agents of the Remza Union, seeking help from Jurai. Ryoko Balta, to this day, is still a member of the Galaxy Police and crewmember of the Kamidake II, along with her husband, Seina and his seven other wives. (source: Wikipedia)