To save time I'll reply to you and Outhra in the same post. As I said, I'm not putting Kitty on trial here or anything, my labouring the "why" point is really just an encouragement to make sure this is something that's thought out; some of my points on why it might not be the best idea are perhaps taking it more seriously than many here would, but I think are worth noting as things to consider re: why it might not be a great idea. That said, it's really more about suggesting she make sure she has a solid idea of who these people are, where they're coming from, why they're doing this, etc; in good writing, whether comedic or serious, things happen for a reason. This could be establishing a character arc or just building up to a joke (good comedy needs a setup and a punchline after all) but when an author has put actual thought into what pieces fall where and why, they'll always turn out a superior project than one who has a bunch of things happening at random just because.
I also take a bit of exception to the implicit idea "realism" is some kind of four letter word that should be verboten, I mean yes, Sedri says it's exactly that in the mission writing guide on the wiki, and she says the same for logic; I suspect she didn't mean that literally and it was more of a response to the influx of grimdark and constant Emergencies at the time, though, and if she did I'd argue with her too. ;) No, obviously not everything should be super serious all the time and conform 100% to how things work in World One - that is an absurd idea and I've argued before I believe that grimdark melodrama doesn't have a place here, but the other side of that coin is the fact everything being constant off-the-wall silliness with no internal consistency, reasons for happening or actual consequences is just as boring. Of course not every agent is going to react just like a typical World One person would - many aren't from World One at all, many others aren't even human, and none are what we'd call typical people I'd think - but I think going the road of "oh, it's just comedy and the agents are just humourboxes, what's the point asking questions and developing things" is a really bad call. It's perfectly possible, and I think more interesting, to have humour and more grounded things in the same setting and potentially even the same work, and to treat them as mutually exclusive (and one of them as not even belonging in the setting at all) is really unnecessarily limiting, plus kind of dismissive towards anyone who actually does want to actually explore and flesh some stuff out - is Night Watch terrible and something that doesn't belong with the rest of the series because it's probably the Discworld book where Sir Terry Pratchett told the fewest jokes?
Obviously I'm not trying to scare Kitty off or force her to write things my way, bully her away from subjects I don't like, making any personal judgements of her based off an agent idea, or suggesting she spend years agonising over every sentence she writes, just giving my take from my own experiences. Admittedly I've developed a critical streak a mile wide in recent times but concrit never killed anybody. I will admit my mind reeled a bit at the prospect of an RC #500,000,000 though, so the very thought made me react with brief alarm. :P In fairness though, I'll note a couple of my personal biases are in play: I'm personally uncomfortable with the idea of children actively fighting reality-warping abominations in the Word Worlds, and I prefer more reasonable RC numbers along with my above-stated preference for keeping things a little closer to Earth so to speak; the really ludicrous ones feel to me like the old trend where CADs would blow up practically every time they were so much as looked at.
Of course, all this is a little tangential to the actual point, that obviously Kitty can write whatever the heck she wants barring a PG veto, but it would be a good idea for her to make sure she knows what she's going for and why, including on the character front - there's all sorts of interesting ways something like this could go, Outhra even pointed out one, and if she knows what makes her agents tick and how and why they react to the things they'll run into in HQ, it'll be a lot better than just winging it.