Legends say, if a Fifth Power Level Son of the Moon becomes the Fifth Power Level Demon Incarnation, he shall ascend to the Sixth Power Level and become the Highest Supreme Perfect Human!
Another legend goes… the Holy Blood of the Eternal Saintess might also elevate the Son of the Moon to the Sixth Power Level.
...Of course, Professor Laximi doesn't really believe in either statement.
The former always seems paradoxical to him—the "Demon Incarnation" that one becomes upon transcending to the Fourth Level inherently means nurturing a new Demon within oneself; similarly, the Son of the Moon is also a new life nurtured from a past soul.
So, if using the Son of the Moon to nurture a Demon Incarnation... setting aside whether it can be nurtured, even if it does come to fruition, would the ultimate "Perfect Human" no longer be the former Son of the Moon or Demon Scholar?