“A righteous, proud, and nationalistic Imperial, Mutuus may be getting older but he still acts like he is in the prime of his life. A contemporary of Valens’ father Munio] Mutuus is a successful warrior in his own right.” – League Training Manual, page 9
Mutuus is a veteran soldier and one of the antagonists of Gladius.
In Akar An, Nazin (shopkeeper), tells you a story of a woman with whom a selfish prince had his way with. She denied the prince, and eventually schemed her way out of the palace, becoming a strong sorceress afterword. It is said she bore the prince's child and they lived out their life with only the company of one another. This son is most likely Mutuus and the sorceress is Nephelia.