How did you discover that it was the original source of the image? Does it say somewhere on the page that you linked to?

What page was it, or do you remember what the username was?

I could put it in Waifu2x, but I was hoping to find the original somewhere. If I could remember who drew the picture exactly, I might be able to find something better. I know that was the best quality I could find on the usual sites, but there could still be something out there.

Thank you for helping out! ^_^