Jonos is a man who is known for frequently glowering and blustering. He is not a tall man, but is heavier, with thick arms and shoulders. He has brown hair and brown eyes. He often wears a woolen tunic with the red horse of House Bracken embroidered on it. when readying for combat he wears plate armour with a greathelm that has a horsehair crest on top of it.
A Game of ThronesEdit
When she arrests Tyrion Lannister, Catelyn Stark mentions that Jonos is a good friend of her father, Hoster Tully. Jonos attends Robb's war council after the Battle of the Camps, suggesting an alliance between House Stark and King Renly Baratheon. He sides with his rival Lord Tytos Blackwood against Catelyn's suggestion of peace. he joins the other riverlords in proclaiming Robb King in the North.
A Clash of KingsEdit
Jonos returns to Stone Hedge to retake and rebuild his castle, which has been burned to the ground by the armies of House Lannister in his absence. He is wounded in the attempt and his nephew Hendry is slain by the Lannister armies.
A Storm of SwordsEdit
Jonos' bastard son, Harry Rivers, has been murdered by Lannister forces, probably the army under the control of Ser Gregor Clegane, who also raped one of Jonos' daughters. Jonos loses a dozen good men at the Red Wedding and subsequently bends the knee to the Iron Throne.
A Dance with DragonsEdit
After Jonos bends the knee he besieges the Blackwood seat of Raventree Hall, because Tytos refuses to bend the knee initially. Upon the advice of Lord Karyl Vance Ser Jaime Lannister travels to Raventree to convince Tytos to surrender. Jonos demands that House Blackwood surrender land to House Bracken, as well as surrendering his daughter Bethany as a hostage to the Iron Throne. He is disappointed when Jaime doesn't secure all the land, and takes Hoster Blackwood as a prisoner instead.