Dominura

Dominura is a member, and the Regina, of Chor Tempest.

Profile
Dominura is a nineteen year old Simoun Sibylla. She is not from the same planet as everyone else in the show, however, and thus ages much differently. Although her body is that of a nineteen year old, chronologically she is about sixty years old.

Dominura was assigned to Chor Dextra along with Aer's grandfather and some others after completing her training long ago. Chor Dextra's only purpose was to master the legendary Emerald Ri Majoon. The Chor practiced hard and then eventually attempted it. It was a failure, however, and most of the Chor died. After Aer's grandfather resigned and eventually passed away, Dominura became the only remaining member of Chor Dextra.

Following Chor Dextra, Dominura became a prominent Sibylla who communicated with the government frequently. She was known as a skilled strategist and wise leader. Dominura was then eventually assigned to Chor Tempest to be their new Regina due to Neviril's PTSD that made her unable to lead her Chor properly. There, she was well-liked by her new crew mates.

Limone became Dominura's piloting partner, and the two developed a strong relationship as a pair. They supported each other during the war and helped each other become better pilots and strategists. However, they eventually got cornered in a battlefield during the war. To escape, the two attempted the Emerald Ri Majoon and, surprisingly, succeeded, being sent back in time. It is then revealed that they were the original Sibylla. They taught Simulacrum how to pilot Simoun and how to make them. Dominura and Limone were the harbingers of the advanced technology Simulacrum became known for, with Dominura coming to the realisation "that everything happened because I started it".

At the end of Simoun, Limone is nineteen years old and she and Dominura's relationship has matured and become romantic.The two of them then embark on a journey to visit more planets and timelines. She never picked a permanent gender, and instead remained gender less.

It is heavily implied that Dominura eventually became Onashia at some point after her travels with Limone.