It's important to give your sidekick moments to look cool and help out instead of just being kidnapped all the time. Misty gets a good bit of that in the coming sequence. Very nice.
Huh. Y'know, it's weird I see Misty as the sidekick when I also view her as the comic's main character. Funny, that.
Yeah, Misty does get a few neat moments in this chapter and a bigger focus than she did back in the third one. It's still mostly Sareena driven for this first part, but for most of it we'll be seeing the two of them working together.
As for which is the lead and which is the sidekick, I don't really see it as anything other than an equal partnership. Sareena has things named after her more often, like the comic itself, but that's kind of to be expected since she gives you more to work with. Plus given the nature of her work Misty's more often going to be operating on the sidelines than front and center. Still, I consider them to be equals there, and we'll be seeing a good deal of both and their interactions together in this one.