Origami R2-D2 was originally a "Life Day" giveaway Tom Angleberger, and is also the cover star for Art2-D2′s Guide to Folding and Doodling: An Origami Yoda Activity Book. Origami C-3PO is with him, helping. He is very popular on Tom's site.
In Art2-D2 he is wielded by Kellen. Though, in Jabba the Puppett, he is wielded by Amy for her "Jedi math skills".
It is unknown is Kellen borrowed Amy's Art2 or he made his own, but they could also both have their own. He is one of the loved charters from the series