"Youve got those kids thinking your some kind of holy vampire"
Manticore Bio
While most transgenics where built to be the ultimate soldiers; Marrow (Manticore designation unknown) was created to be a human blood bank or has he puts it "the red cross". Manticore designed all transgenics to be universal donors but in Marrow's case they decided to go further and create a being with perfect blood. They removed all blood impurities from his body and filled him with all the good stuff you can get in blood. His body therefore produces more blood than the average human or transgenic and also blood in its most pure form.
It is unknown weather Marrow was a successful project because while his blood produces super human abilities in normal people, but at the expense of being highly addictive. Though it could be possible his blood was intended to only be used on transgenics.
Because of his appearance Marrow can not entirly pass for human and may be mistaken for an an anomaly. His genetic makeup has given him a rather pale complexion, ice blue eyes and most disturbingly large protruding veins stretching all over his body.