SPOOOOILERS chapter 24 o/
'You were neither reproduced by cloning nor by rearrangement of genes.
We fixed your (genetic) make-up one by one, and you are a complete MAN-MADE BODY.'
OKAY. ESSENTIALLY Fon was not born, he was created. He isn't a clone nor genetically altered, he was actually made from scratch. Fon has ~no clue~ I am not updating him until I get more on how he behaves after he finds out.
WHAT THIS MEANS IS basically if you have a genius scientist-type character they might notice.
Also, his memories are fake! So people who characters who notice that kind of stuff (CLAMP?!!) would probably know.
AND LASTLY, his ultimate goal isn't really his, it was implanted in him. I have no idea of who'd notice that, but I figured it was worth mentioning.
He's still slightly unstable.
Look at him, he is so sad :(