If you are looking for the best paper to print a 3D papercraft model of from the Atelier Ryza series, your choice depends on the specific project type. For 3D Papercraft Models
For complex, structural papercraft models (where you cut, fold, and glue 3D shapes), the following is recommended:
Reisalin "Ryza" Stout is the cheerful, tomboyish alchemist lead of the Atelier Ryza trilogy.
This provides a professional look for character art cards, especially for those with "Sunlit Beach" or swimsuit versions of Ryza.