Rigelus is the head of the Asteri.
Rigelus first appears over video call with the other Asteri before the Valbaran Summit. He, along with his siblings, formally recognize Hypaxia Enador as the Queen of the Valbaran Witches. They express their wish for the attendees of the summit to discuss a way to end the war and then depart, though not before Rigelus takes note of Hunt Athalar staring straight at him.
After Bryce Quinlan reveals her status as a very powerful Starborn Fae while protecting the city of Lunathion from an infestation of demons, Rigelus calls her over the phone to thank her for saving the city and apologize for nearly destroying it with the Asteri's brimstone missiles, although Bryce recognizes that his apology is a cover-up for the fact that the Asteri were attempting to kill her. He grants Hunt his permanent freedom, complete with a "C" for freedom marked over his brand, and surreptitiously threatens Bryce's mother in order to remind her to stay in her lane and not cause trouble for the Asteri.
He is described as a slim and lanky teenage boy with cold eyes and a chilling smile.
Powers & Abilities
As the head of Asteri, he is the most powerful of them.