User blog comment:7-45 Fire/The Roxy question/@comment-29197449-20170622025225/@comment-31892545-20170622033840

It's evident when looking at at S5-7, and even WOW. She doesn't earn a new transformation, she stays in the background S5-6, and in Season 7, she gains a "Season 6 Daphne" roll - a stand in, if you will. Not a Winx, but someone who helps the Winx. In between a Winx and a supporting character. There's no "official" statement released, and I doubt there will ever will be anything besides speculation, but one can pick up on it.