A prominent researcher at the Erianne Institute and probable cause of the Lecone catastrophe.
If the things we don’t know about Burke were droplets of water, we’d have an ocean on our hands.
For instance, how is he both a doctor and an archmage? How long have he and his two associates, Meath and Offaly, been alive? Why was Percy investigating him in the first place?
What we do know is detailed here.