The news free 6* looks nice. And indeed, she cost almost nothing. 1200 castle medals? That's something like 10 floors? Or less? With Normal mode it's a really easy to get girl.

The new... super final boss(?) from main event is interesting. I hope we will have a special stage just for it. Someone have an idea about what it is?

About solar team, with enough sun damage memories it should be great. Good enough to blow every weaker bosses, boss phases or anything once. But it may has troubles with highest difficulty stuff. Mainly because you can expect something between 1M or 2M damages when current enemies bring far more.