Okay, this actually made Imitatio WAY more interesting, since she genuinely doesn't know Baiser's personality and intentions. Before she seemed like she was aware of everything and working towards some unknown goal like Vena, but this makes clear that was just a facade she was putting up, and she doesn't actually know that much.
From what it looks like, the Shio-chans are just magical girl fans who naturally hate the bad guys, aka Enormeeta, just like anyone else. But happened to find a way to get a lot of power and learn everyone's identities (still a really big deal to know where they learned that from). Her getting this freaked out by the thought of Baiser maybe not being the monster she thought she was makes her entire involvement in the story way more interesting and brings a ton of potential for future interactions.
On another topic, Berserga looks as mentally unhealthy as ever, which could turn out to be a pretty big issue now that Imitatio's starting to lose composure a bit. This does seem to indicate that Imitatio isn't quite as evil and manipulative as she seemed (she's still clearly manipulate though), so I'm going to rule out the "She's Makima" idea, which makes me think Berserga being this obsessed with her probably wasn't an intentional manipulation. That's another thing that has good potential for the future and can lead to some pretty serious and heavy character development, so I'm excited for it.
Pantano's still just a pervert though, can't see all that much more depth to her yet. Still, considering Imitatio's opinions on Baiser and how similar Pantano seems to be to her, that could lead to some interesting scenes.