It looks like this one from a different angel:
Actually, they're all from the HQ screenshots released i think.
Couldn't find the art for characters like Siegfried and Cassandra because they never released their assets, but yea..
I can't believe I have to clarify this but here we go: saying something is dumb =/= saying something is impossible to happen or never happened in the past.
I just don't see why they would bring back Viola. Amy's story chronicle feels like it's a sign that Amy wouldn't turn into that again...
Viola's style will return at some point, just not Viola herself. It'd be stupid to have both her and Amy together. I'd much rather they give her style to someone interesting like Acht.