If you are all wondering what the new character at the end of LTIARA is and what he looks like:
Here he is.
Everyone, meet Theodore "Theo" Fang. Brother of Jackson Fang and a terrorist mastermind. He has the unnatural power to control demons and, even more unnatural, to bring back the dead as full demons or shape-shifters, demons who can shift into their neutral form, the form they had before they died and/or turned, and into their demon form.
He is about in this late teens (17-19) who shows little emotion but is very intelligent and manipulative.
He got his face scar from his father who was like Jackson: abusive and cruel. His mother died when he was 3.
But when he turned 9, his father died. No one knows how, no one except Theo.