That was pretty good. I enjoyed reading it. I especially liked Sir Liverworst and his... eccentric behavior.
I'm looking forward to seeing them on the field. They seem like they'd make an excellent "team".

Lovely. Yes, I mean it.

I quite like your soon-to-be-agents. They're funny together, and they each bring something to the table; I think they'll make a very entertaining trio of partners (assuming you'll be partnering them all together).

Now, there is something you're neglecting in this story: the semicolons. Those poor, poor semicolons. They want to help you connect sentences together, if only if you'll let them. For example, one sentence you have:

"The acolyte stirred and opened her eyes, the metal roof of the gymnasium was back, blocking off the sky."

should have a semicolon after "eyes," and look like:

"The acolyte stirred and opened her eyes; the metal roof of the gymnasium was back, blocking off the sky."

to separate the ideas "The acolyte stirred and opened her eyes." and "The metal roof of the gymnasium was back, blocking off the sky." They could stand as sentences on their own, but when they combine into one sentence, they need a semicolon to separate them. There are quite a few sentences here that need semicolons, as well as a few other grammatical errors here and there. I would suggest reading through again and looking for them. This community also happens to be an excellent source of beta readers, so don't be afraid to ask folks for help!