Adaon was born to the Unseelie King and an unknown faerie woman. Unlike the rest of his siblings, Adaon never wanted the throne, as he was loyal to his father and disliked seeing people get hurt. Adaon was close to his half-brother Kieran, and gave him a faerie steed named Windspear as a gift when he was very young.
In 2012, Adaon was present at Kieran's execution. He refused to help bind his brother with thorns and walked away, making no attempt to help him. The Seelie Queen deemed him as worthy of his father's throne and offered to help him ascend with Kieran's help.
Adaon is tall with deep brown skin, gleaming eyes and long slender hands. He wears the skull of a raven dipped in gold around his throat.
Adaon is less ruthless than his siblings. He cannot stand to see people get hurt, and disapproves of his brothers' cruelty. He is very loyal to his father, to the point of letting his brother die. Despite his upbringing, Adaon is capable of showing kindness.
- Lord of Shadows (first appearance)
- Adaon is one of the sons of the Unseelie King that Kieran is closer to.