Fourth Wing » Fen Riorson

Fen Riorson

Fenn Riorson is the father of Xaden Riorson and one of the leaders of the Tyrrish Rebellion in Fourth Wing.

Name	Fen Riorson
Age	Unknown
Species	Human
Status	Deceased
Quadrant	Infantry (Formerly)
Rank/Title	Duke of Tyrrendor
Eye Color	Unknown
Hair Color	Unknown
Family	Talia Riorson (wife), unnamed sister †, Xaden Riorson (son), Bodhi Durran (nephew), Violet Sorrengail (daughter-in-law)
Love Interests	Talia Riorson (wife)
Mentioned in	Fourth Wing (2023), Iron Flame (2023), Onyx Storm (2025)

Contents

Biography

Fen Riorson, Duke of Aretia, was the leader of the Tyrrish Rebellion (Apostasy) and was also known by the alias “The Great Betrayer.” Father of Xaden Riorson, he also had a sister and a nephew, Bodhi, with family ties deeply shaped by both duty and betrayal. His contractual marriage to Talia Riorson produced an heir, but after her departure, he turned his focus to building alliances and gathering supporters to secede from Navarre. Among these efforts was a betrothal arrangement between Xaden and Catriona Cordella to strengthen his position. During the Battle of Aretia, he was responsible for the death of Brennan Sorrengail before being captured by General Lilith Sorrengail. In captivity, he accused King Tauri and his predecessors of conspiracy, but was executed by dragonfire soon after, bringing his rebellion to an end.

Relationships

Xaden Riorson	Xaden is Fen’s only son. To secure a luminary for Tyrrendor, Fen arranged his betrothal to Catriona Cordella. Before the Battle of Aretia, he sent Xaden away for safety, but their parting ended in anger — something Xaden later regretted. Fen had hoped his son would join the Infantry Quadrant and taught him both discipline and small courtesies.
Talia Riorson	Fen was bound to Talia Riorson through a marriage contract that required her to bear an heir and ensure the child’s survival until the age of ten. After Xaden reached that age, Talia left. Fen himself wrote that aristocratic marriage was a necessary evil and that love should be reserved for one’s children, implying he was not a loving husband.