I've been sitting on this guy for a month...
Say hello to META! He's a reflection of the Undertale AU multiverse. And because there are so many Sanses across that good old doodlesphere of ours, that's become his main form! Because he is a said reflection, he has no SOUL. Meta lives in the cracks between the universes. (Think the anti-void or Omega Timeline, but the "doors" are open all the time.) Characters appear there for a split second when they're between universes during teleporting (I'll post later elaborating where he is).
Here are all my doodles :)
He's been tucked in a dusty corner of the multiverse for a while, but Ink somehow found him. And now Meta's here, very sarcastic and very aware of the fourth wall.
He knows you're watching.