I think he would be Chara because they are both missunderstode. :3
And I gots proof! Check out a video called Who's The True Villain of Undertale!
Bullet: IT IS I, THE GRATE BULLET! Me: so cool so coo so cool so cool- Bullet: SHUT UP! Me: ok.
I ONLY CRAVE UR GASE! AND NOW MT HEART IS DARK MY BITE IS WORST THAN MY BARK-
We are with your old selfs. Like what we used to look like.