|Role||Fourth Imperator of the UEE|
|Years Held||2643 - 2643|
Marius Messer was formally the fourth Imperator of the UEE. Because he died in an accident or assassination attempt in 2641, he never took de facto office. His mother Livia Messer, who barely survived the event, later abdicated and declared him as her formal successor.
Marius was the son of Daniel Scota and Livia Messer, spending his childhood on Earth with his cousins Gammon Messer and Illyana Messer. Tutored by his grandfather Deacon Messer, Marius would often accompany him and his mother on their regular tours through the UEE. At age 16 he was accepted to the UNFA, but the same year he died in a catastrophic failure upon atmospheric re-entry over Moscow.