Gwennin

Gwennin is a Sidhe lord of the Unseelie Court. He was formerly a member of the Seelie Court and was one of the last ones to be banished from it. He still acts as if he can return to the Seelie court, which is not possible because the Seelie do not take those who were ever members of the Unseelie court. He is no friend of Prince Cel's.

A Stroke of Midnight
Gwennin is brought before the Queen Andais by Doyle, Usna, and Cathbodua for casting a spell on Biddy. The spell was meant to spread to human police officers who were investigating murders of Beatrice and a human reporter. Gwennin admits he didn't like that Meredith invited human police to solve the murders. Andais and Ezekial torture him and it is revealed that Gwennin was also the one who killed Beatrice and a human reporter inside the faerie mound. He did it because Beatrice was his lover, but she started to refuse him. He didn't mean to kill her, just to hurt her. He stabbed her in her back piercing her heart, but the weakened state of faerie magic caused it to be a mortal wound despite that the murder weapon was not made from iron and wasn't magical. The human reporter had to die because he was a witness to it.

Andais plans on killing him no longer than the next day, but Meredith convinces her that it is wise to postpone the execution until the human police close the case and Gwennin can be shown to a press conference as a culprit.