[It's actually freaking her out a little. Oona gives him an uncertain look]

Suppose... It is weird. You are never in good mood, you always look ready to scold.

[But his comment about her own good mood perks her up again] Of course! [She raises her tail and splashes it against the water] Have my tail back! Could not be happier about that, I am whole again!

Ah, of course, can not stay once water is gone... But! It is here for now!