Except... she does... they look like Bolverk, they shapeshift like Bolverk, they work with her Drive like Bolverk, and they do Bolverk normals... it's Bolverk...
Further, something causes the burst icon to black out (as seen near the end when Amane does a DD, but it never occurs earlier in the trailer when DDs are done)
Let's not make conclusions on character changes based off of 6 seconds of individual gameplay. Let's wait for the upcoming loketests before even theory fightin'.