|Years of Service||2647 - 2662|
Gammon Messer was the designated heir of the Empire from 2643 until his death in 2662 and son of Imperator Corsen Messer V.
Gammon was raised with his sister Illyana on Earth. Until the unexpected death of heir Marius Messer, he had spent 'his youth pursuing hobbies' and he was possibly 'indulged heavily in vice.' He was forced into military service in 2647.
At this time, he was known for his many visits to the political prisons on Charon III alongside his father Corsen. He is even said to have worsened the prisoner conditions further and 'devised particularly violent forms of information extraction.'
Gammon Messer and his father were poisoned by his sister Illyana Messer in 2662.
They had one child:
- Astrid Messer VII; *2661, 7nd Imperator of the UEE