Edited Ryuu slightly. After thinking it over, I really liked Natsu/Taki's styles from soul calibur. So I just gave Ryuu two Wakizashi instead of one katana. No jutsu were changed except to add in the second blade. 
[hider=Front and Back Picture Change]
[img=http://i.imgur.com/lbXn2LG.jpg]

[img=http://i.imgur.com/EAiAz4N.png][/hider]