Ag'hel was a female Klingon in the Klingon Defense Force. As of the year 2287, she held the rank of lieutenant, and served as first officer of the IKS Terthos under Captain K'tran. She was an ambitious officer, who intended to become the first female to command a Defense Force starship. In addition, Ag'hel was an agent loyal to Councillor Komor, who acted in concert with Ambassador Kaljagh to derail the peace talks with the Federation held on Starbase 49. She was eventually discovered after planting a photon torpedo on the hull of the Terthos. (TOS novel: In the Name of Honor)