I tried to suggest aliasing amadeus_(artist) to nikoh but it returned an error message because fefe is already aliased to amadeus_(artist). My thought was that this could go in either direction, but I think changing it to nikoh would be better. The artist is signing all his current work as AmaDeus, but he has two FA accounts and nikoh is by far the more used tag on this site.
http://www.furaffinity.net/user/nikoh
http://www.furaffinity.net/user/amadeusd