Dermot Shan

 or Mr. Shan in the movie is supposedly Darren Shan's father. He is also the father of Annie Shan and the husband of Angela Shan. Little did he know that it was actually Desmond Tiny who secretly impregnated Angela making him the real father and Dermot was not Darren's father. He liked to to gardening a lot before Darren's 'death'

After Dermot and Angela had helped Annie raise Darius Shan, he and Angela moved away as the house reminded them of Darren leaving Annie at the house with Darius.

Books

 * Cirque Du Freak

Movies

 * Cirque du Freak: The Vampire's Assistant