I made a blunder try fighting them full power once, barely made it with only Anemone alive thanks to guts and she super counter Alicia to death. It is much, much easier with Lupin out however.
About Touka (new event girl) well I guess it's artist style. I mean even Mint dress code is pretty questionable. She might going commando for her danchou sake.
Her ability is really useful in whaleship however, as support of course, as she provides ZERO boost in terms of atk or def.