User blog comment:Mokushiryu/Requesting Help./@comment-26305407-20150328154503/@comment-26305407-20150330140714

For their avatars I wouldn't make them the same as their Naruto equivalents, instead make them armoured warriors made of energy that have the properties of their respective magics. You could also personalise them; e.g. Kyuubi generates a dark red avatar made of flames, that can generate smaller flame avatars that can attack independently, while the main has a scythe that can cause illusions via its swinging. All that is just an example and can be taken however.

Also, they could all combine their avatars into the Juubi, a giant white avatar that can manipulate all of their powers to greater extents that even the jinchuriki's themselves can. Again, just an example. The avatar stuff is ultimatly up to you.