She is from another time, an ancient time, an ancient place.  Being one of the ones who have never stepped out from the Abyss, in any form or name, she only has the memories and experiences of the lost souls and misguided bloodbags of mortal flesh to go by on.  The blood of her enemies, the celestials and angels she has warred with also contains helpful memories.  Before she finally meets this pretty Wolf, nearby yet far enough, there is a sudden thirst that needs to be sated.  Out from the dark, she grabs a man walking home from work.  Gripping the back of the man's neck, she pushes him forward and slams.  The bite is quicker than anything, her victim's jaw is crushed, his blood instantaneously drained.  Not one drop is left and Crimson lets this human drop.