@Lucius Cypher Well, fine, those questions are going to clarify a few things. Here at the answers:
1 - Semi-compulsory transformation, as is usual within the mahou shoujo genre for the first transformation ever.
2 - Yup. Everyone is about as strong and agile as your usual Precure when in magical girl form. Though, obviously, the specs vary from girl to girl. I expect that someone like Delia would be much more agile than most, while Chikage will probably be a stone wall of sorts, but on the end the final choice is up to you. Obviously, Chiharu will be the "pulverize concrete with a punch" type, but that's her charm, right?
3 - Again, I'm going to use a Precure analogy, since the mooks are about as strong as a typical Zakeena (and actually, operate in pretty much the same way). A normal person wouldn't be able to do much more than stall them for a few minutes. Otherwise, what would be the need for magical girls?
4 - No, as
@liferusher's post estates, this is your usual magical sealed zone, that modern fantasy anime like to use. Anything that moves there is pretty much sure to be a magical being, our have some other strange power. Furthermore, unless otherwise noted, nothing you do there had any influence over the material world, so, you can go would on your fights.
5 - Surely, there's more than a few of you who are within short range of one another. Of you want to interact between yourselves that would be really cool.
6 - Well, having, or not having, weapons and when to acquire them is up to you as well. Though, it certainly isn't a requirement, as more than a few classic mahou shoujo fight with nothing but their frilly coated fists and feet.
<Snipped quote by Lucius Cypher>
What!? Where is this from? The Hokuto no Ken antivirus?