Board Thread:Wiki Discussion/@comment-5164724-20130415051753/@comment-3076833-20130415230913

If you're going to pull up the "recognised by Yamaha" card then strictly speaking Neru, Haku and the like would all be "Semi-official Avatars" too as they're fanmade characters recognised by Crypton.

And I fail to see how Roro and Kiku doesn't match your description of derivative, because that's exactly what they are; characters based on VY1 and VY2 based on how the artists saw the product.