Until it gets explicitly stated in the show, I am not believing in the Senti-Monster Adriwn theory.
This might make everyone think I'm being hard-headed ir refusing to accept facts, but I've figured over time the only true reliable source is the show itself.
And also if he ever does get confirmed as a senti, he won't be in my fics, and I would just ignore that part of Canon.
Being that I'm one of the only ones left who thinks he could still not be a senti, means I'm likely wrong, but until it gets confirmed in an episode, I stand on this hill.