Oh, this makes absolute sense, then. I am pretty sure that NEP 1 is said in the profile via ability or?
Naturally, he is not always nonexistent (only in his second version).
But also, if you ask me honestly, this is still not Nature type 1. Since version 1 and version 3 his nature still exist. And version type 2 is the only nonexistent, and it seems he only toggles on/off when someone attacks him and thinks as well.
This one is catchy. I guess the existence here refers to the soul instead of the abstract concept of someone's existence.
It could possibly acquire aspect 2. But I guess this is not the OP message.
As for nature, the ability makes him become NEP and when he becomes NEP he can think. So it's an ability to become NEP 3.