Bella Gruen
Female silhouette

Bella Gruen was a president of a nation that was located on, or included the planet Arslan.

The Adventures of Captain Devereaux, an account of forty years of voyages as spacer and captain, was printed on Arslan in the tenth year of the third indiction of President Gruen (around 2448 CE).3:22

This implies that she had been in office for a long time, presumably forty years, at the time of the printing.