| Name | Brennan Sorrengail |
|---|---|
| Age | 29-30 years |
| Species | Human |
| Status | Alive (presumed dead in Fourth Wing) |
| Quadrant | Riders Quadrant, Basgiath War College (graduate) |
| Rank/Title | Lieutenant Colonel |
| Signet | Mending |
| Eye Color | Amber |
| Hair Color | Reddish-Brown |
| Dragon Bonds | Marbh (Orange Daggertail) |
| Family | Asher Sorrengail † (father), Lilith Sorrengail † (mother), Mira (sister), Violet (sister), Xaden (brother-in-law) |
| Love Interests | Not listed / not known in canon |
| Appears in | Fourth Wing (2023), Iron Flame (2023), Onyx Storm (2025) |
Contents
Biography
Brennan Sorrengail is the eldest child of General Lilith and Lieutenant Colonel Asher Sorrengail, and the older brother of Mira and Violet. Born with natural strength and determination, Brennan entered the Riders Quadrant at Basgiath War College, where he bonded with Marbh, an orange daggertail dragon. His signet, Mending, made him one of the rare riders capable of healing injuries and restoring strength.
Officially, Brennan was believed to have been killed during the Tyrrish Rebellion. In truth, he faked his death and secretly joined the revolution in Aretia, working in opposition to Navarre’s leadership. For six years, he operated as a commander and strategist, becoming a central figure in rebuilding defenses and organizing riders and gryphon fliers against the growing venin threat.
When Violet discovers him alive at the end of Fourth Wing, Brennan’s return reshapes the Sorrengail family. His presence provides Violet with mentorship and guidance as she learns to embrace her role as a rider and wielder of lightning. Through Iron Flame and Onyx Storm, Brennan remains a steadfast leader in the rebellion, balancing his role as healer and tactician with his devotion to protecting his siblings and all of Navarre.
Physical Description
Body & Build
- Tall and strong, with a rider’s athletic build.
Hair
- Reddish-brown.
Eyes & Skin
- Amber eyes.
Clothing & Gear
- Standard rider leathers and uniforms associated with his rank as Lieutenant Colonel.
Powers
Lesser Magic
Like all bonded riders, Brennan can channel lesser magic through his dragon, Marbh. This ability allows him to manipulate mage lights, enhance his movement, and interact with objects such as doors or runes without physical touch.
Signet
Brennan’s signet is Mending, which grants him the ability to fix, restore, or return things to their original state. He can use this gift on objects as small as torn cloth or as large as broken bridges, and he is also able to mend human bones and injuries. However, the ability has clear limits: Brennan cannot perform mending magic itself, nor can he restore items that are completely severed, such as a cut-off finger. Considered one of the most powerful menders of his generation, he would have been hailed as Navarre’s greatest had he not faked his death.
Abilities
Languages
Brennan learned Tyrrish from his father and also speaks Krovlish. In addition, he is fluent in the common language of Navarre.
Strategist
Brennan is an experienced strategist, skilled in planning and coordinating rebellion operations. He has proven adept at organizing defenses and at training both riders and gryphon fliers in Aretia.
Poison Mastery
He is trained in the use of poisons and has extensive knowledge of toxins and their application in combat situations.
Relationships
| Violet Sorrengail | Brennan and Violet share a deep sibling bond built on trust and understanding. Long believed to be dead, Brennan’s survival is a turning point for Violet, and the two work closely together in Aretia after reuniting. He supports her growth as both a rider and a leader, guiding her through the realities of the Revolution. |
|---|---|
| Mira Sorrengail | Mira and Brennan have a complicated but affectionate relationship. While they often disagree on methods and loyalties, both siblings are devoted to protecting Violet and share a mutual respect rooted in family and duty. |
| Lilith Sorrengail | Brennan’s relationship with his mother was strained. For years, he believed Lilith had sacrificed him for Navarre’s lies, fueling his resentment and grief. When they reunite six years later in Athebyne, Lilith is overcome with emotion, but Brennan remains distant, unable to forgive her completely before her death. |
| Asher Sorrengail | Asher was a loving and influential father to Brennan, teaching him Tyrrish and fostering his curiosity for language and knowledge. His death left Brennan devastated, further shaping his cautious, introspective nature. |
Dragon
Marbh
Marbh is an Orange Daggertail dragon bonded to Brennan Sorrengail during his time at Basgiath War College. As Brennan’s dragon, Marbh provides the channel for his lesser magic and his signet, Mending. Through Marbh, Brennan sustains his power as one of the most skilled menders of his generation, a gift that has played a critical role in strengthening his place within the rebellion.
