Jack Darcy

Jack Darcy is the character in Cillian and Lorcan Darcy's Adventures. He's  the main antagonist of  Cillian, the supporting protagonist of The Medieval Journey, the secondary protagonist of The Last Result, the minor antagonist in first part and the true main antagonist of the second part of season 7. He's Mike and Molly's first son and Lorcan's older brother. He's also the main antagonist of the entire seventh season of Lorcan Darcy's Adventures.