Cain wonders ( he's not supposed to do that either ) sometimes, on the subject of Akuma.
For one, the finder he questioned had never heard of the Akuma's own blood working against them as a weapon.
Then again, as far as the finder boy knew it was ridiculous and suicidal to even consider trying to use the substance.
For a very simple and actually somewhat sensible reason.
After all, the information he gleans off of the finder reveals that the blood of an akuma is poisonous, supposedly killing of regular humans, like Cain himself in seconds and non-parasitic type exorcists in a slightly longer time.
So how exactly can Cain touch it?
He's done it enough times, shattering one of his jars when thrown against a building on a hit, excess spray hitting his face as he disposes of a stray akuma and more, so many more times.
I'm addition to this, according to his finder friend, akuma oil is just as deadly when inhaled.
And yet, somehow...
Never, not once, has he beheld even the slightest hint of a pentagram adorning his pale skin.
It's interesting.
It's an anomaly.
Cain doesn't like anomalies.
He likes being one even less