So I recently started writing a new fic called Come and Play With Me on Ao3 and a commenter mentioned that they think Void Form Harry looks like NIghtmare!Sans. It gave me inspiration to draw up a quick thing about what I think Void Harry looks like. His body is vaguely human shaped, rippled and disproportionate, like his magic is only forming this way on habit then any thought or detail to it. When he makes a face, since it’s usually just a blank skull, It shimmers with purple magic and his eyes glow purple as well. They have a feint green tinge underneath but I couldn’t get that to show since I’m not that good at color drawing lol. His hair is thin wisps of black that float like he’s in water. The tendrils he forms from his back also glow a bit purple with magic though they are completely black and leave black residue if left in place for long. Sometimes he makes clothing but it just blends into the black of his body and forms a sort of raised outline of clothing. Hope this helps a bit when I describe him! I’ll post what he’s like when he’s half human. Aka ‘trying to not be intimidating to Blueberry’s.’