Charmisedra

Charmisedra is a single dim star of unknown composition with one major terrestrial planet. The star served as the central energy source of an extinct human race living in a man-made ring around the star.

Charmisedral Ring
The man-made metallic ring around the star, nicknamed the "Charmisedral Ring", spanned a radius of less than half of Mercury's orbit and was home to at least 5 billion people. The ring is predicted to have taken 60 years, using advanced probe construction methods. The resources for the ring were most likely mined from Charmisedra-b and the rich asteroids around the star. However, the project did not appear to originate from Charmisedra-b, rather, the ring was most likely built by interstellar explorers.

The Charmisedral Ring lasted some centuries before the defense systems were sabotaged, leading to a wreckage on one section of the ring, ultimately resulting in the overall collapse of the ring and the death of all people on it.

Purpose
The ring mainly served as a relatively obscure (in galactic standards) safe-haven home for some humans. It also contained ancient human relics, including the dead bodies of some of the last Earth survivors. The bodies eventually became the final subjects of the ring population's experimental cloning technology.

Cloning Technology
Overall, the cloning was not successful, as unknown errors resulted in the clones' mood to turn overtly suicidal and aggressive.