A new form for Esther that i call the "Kitsoogon" (Kitsune + Raccoon + Dragon).
The idea behind this was that this was not a usual temporary side form that she would just shapeshift into and out of, but more of a permanent evolution or ascension to her powers that she gains at some point in her story. Currently in the 'canon storyline' this is her new "true form" and the kitsoone form is a shapeshift.

If you want a more detailed breakdown, check out the page on her Toyhou.se profile.