As a consequence of her gestation within an Earth atmosphere, the Carnage symbiote possesses unusual neurochemistry compared to other symbiotes. One such consequence of this unique makeup is her extraordinarily powerful mental bond with her original and primary host, Cletus Kasady. So strong is this bond that the symbiote contains an exact copy of Kasady's memories and personality, which not only shaped the fledgling symbiote into a mental near-duplicate of her host