Sejandus

Marcus Cornelius Falco's father was killed as a supporter of the treasonous Praetorian Prefect Sejandus in the midst of Imperial power struggles while Marcus was just a boy. (GAME: "Non-Player Characters" ^[+]Part of The Legions of Death, Loading...{"namedpart":"Non-Player Characters","1":"The Legions of Death (game)"})

Behind the scenes

This appears to be a typo for Sejanus, a Praetorian Prefect who was killed in 31 AD for treason.