Bo'roth

Bo'roth was a Klingon Defense Force officer, and the first officer of the KDF flagship as of 2409. 

Biography
Bo'roth was born a commoner and met Koren, daughter of Grilka at the Klingon Academy. They found they had much in common, particularly in their views on battle and honor, and became close friends. She was his first ever friend from one of the Great Houses.

By 2409 Koren had been made commanding officer of the IKS Bortasqu', and chose her old friend Bo'roth to be her XO.