The proof for Wavy vs Dreamy tails is missing, so I have unboxed this girl
I can't prove it with 100% certainty, but her dreamy tail should be pure. Her line predates Fluffy and Wavy and has never seen a giraffe.
This chart should prove that Roshay hides Wavy tail, as Wavy is known to be dominant to Fluffy and must have passed from him
Let's hope these two will behave better than a certain other pair I know.
*places catnip on platform*