Gregory Sackville-Bagg
Gregory became a vampire just as he was entering puberty and is therefore cursed with eternal puberty. This makes him very tempermental and moody. Unlike his younger siblings he doesn't like reading, he prefers "action". Even though he is difficult at times, he is loyal to his siblings and, at the end of the film, proves loyalty to his clan by calling the Clan using the Amulet Of Lost Souls.