1. MSS. - can't help you- dunno
   
   2. On Elves of the LOTR variety. - I heard in the Silmarillion they're supposed to have 'leaf-shaped' ones, but that could just be- okay here's the link. It's complicated, language-wise... But you can take whichever side of the argument you wish.
   http://tolkien.slimy.com/essays/Ears.html
   
   
   3. Minis. - I dunno, {again} but I guess you could, for the Rule of Funny. I mean, isn't that what the PPC is really all about?
   
   Can't help with these- okay
   Sorry

MSS was mentioned in an issue of the Multiverse Monitor. If you've not read that issue, you should:

Multiverse Monitor, Issue 2

The Monitor is a bit tabloid-like, so it's up to you whether you want your agent to have MSS or not--for all we know, it's about as reliable as the Sunflower official's "love vase". We know that MSS doesn't affect all ex-Sue agents; it may not affect any, or only a very few.

Relevant quotes:
"It happens to anyone who used to be a Sue/Stu. It’s something mainly found in females, though. In short…it’s like turning into a werewolf every full moon…except you turn into a beautiful, long-legged, perky breasted, urple haired freak once a month for four to seven days."

The Multiverse Monitor was published from 2006 to 2007, so this might've happened before it became common for minor ex-Sues to join the PPC. It's quite reasonable that in the four years since then it's become possible to maintain an ex-Sue without her ever reverting. A lot of the current reformed Sues take medication to prevent them becoming Sues again (notably anti-lustin and logicillin). Maybe this is part of what the meds prevent.

MSS was mentioned in an issue of the Multiverse Monitor. If you've not read that issue, you should:

1. MSS = "Mary Sue Syndrome"? If so, I'd say it can affect natives of other canons as well.
   If you're referring to something else, then not sure.
   
   2. Tolkien said something along the lines of them having "leaf shaped ears" (He didn't specify which leaf; I'm assuming not a maple leaf or anything like that). My personal view is that they're a bit more rounded than as portrayed in the movies, but still more elongated than most human ears.
   
   4. Ardalambion is good; Real Elvish also has some name lists (arranged by meaning) http://www.realelvish.net/namelists.php
   Most of them seem to be legit, as far as I can tell.
   
   6. I'd say post all four. There's nothing that says you can only have two Agents. That said, it's a good idea to only have as many Agents as you can write properly (hypocritical, I know, from the guy with six Agents; three of which have hardly gotten any screen time).
   
   Elcalion

1. What do you mean by "MSS"? I'm not familiar with the term and neither the PPC wiki or proper Wikipedia are giving me an explanation.
   
   2. Generally, we assume that they do, but I wouldn't make it a big Charge if you can avoid it unless it's absolutely, definitely movieverse.
   
   3. It's closer to an actual 'law' than not, simply because we do try to be consistent throughout as many stories as possible. There may be a reason why other minis don't conform - such as, maybe, that there was description in the fic they were found in that directly influenced their appearance. I'd really rather that you didn't make a mini-Hedwig; perhaps your agents could adopt a forced-into-OOC-ness replacement for Pigwidgeon instead?
   
   4. Ardalambion is the best site I know for Tolkien's languages; I haven't explored the whole thing, but there's a course showing you exactly how the grammar of Quenya works, so that should help you somewhat.
   
   5. No idea, sorry. I don't know the fandom.
   
   6. Unless you plan on having all four of them work together in your missions (and for sheer confusion factor, I strongly suggest you don't, at least not for the first few missions), then stick to the two you will be writing about. Remember, mission writing is really a lot more work than it looks, so you won't be churning them out every few days. Start slow. There's always time later.
   
   Hope that helped.

Hey, a question I can actually help with!

To my knowledge, though I could be wrong on this, the Piper's Children stop aging for two reasons:

1) Time flows differently in the House, meaning that what would be days for them could be anything from seconds to years in the world they came from.

2) After spending enough time in the House, their humanity slowly starts to fade, and they become part Denizen. Also, due to being part Denizen, I don't think they age outside of the House either, or if they do, it'd be much slower.

So, to that effect, you couldn't exactly have an ex-Piper's Child, because the Piper's Children are what they are. You could have a Piper's Child who no longer lived in the House, but I think it's far more likely that a Piper's Child who was an Agent would have simply descovered a hallway in the House that connected to a hallway in the HQ, and just assumed that this was all part of the House and how it worked.