The Doomsday Men's possible identity
In volume 3, its said that Dracula has
three Doomsday Men aboard the Satanic and he "activates" (i.e. kills) one of them to destroy millions of lemures attacking his ship in one fell swoop. Given that
Adolf Hitler was the one killed to banish the lemures, its possible the doomsday men were all the worst mass murderers in history, with the other two being
Stalin and Mao Zedong.
A Vampire Knight's sword gains some personality traits from its owner
Requiem's sword refuses to betray him to Claudia because its owner is one of the very few
relatively noble vampires in existence, causing the blade to "attune" itself to his personality.