Kyle wasn't affected by the bond she had offered him back then.
At the time, Kyle could only accept that Artemis had helped him by bestowing her blessing upon him. Yet by doing so, she had also drawn the attention of those who had been deliberately ignoring his presence until that point.
Before receiving her blessing, he had already been targeted by the other side. Afterward, however, both Devils and angels had turned their attention toward him.
Now, having unlocked his Origin, he could easily suppress that blessing for the benefit of both sides.
His refined Genesis would draw an excessive amount of energy from the moon whenever he emerged into the light, and that constant drain would inevitably weaken his mortal shell.
Moreover, having an apostle of such overwhelming strength would affect Artemis as well, particularly her standing among her peers.
