If I may butt in...
Psysama, Raineh's frustrations are valid. As someone who is has been a DM for a while, may I provide some helpful advice? It's time to go a bit meta here and talk about player agency and immersion. I would say player agency, or at the very least the illusion of it, is one of the most important things you need to do as a DM. What I mean by player agency is that the player needs to feel they are in control of both themselves and the world. To a point of course... a player can't reasonably expect to waltz into the Kingdom of Badasses and just take the crown, but things which are reasonable should be in their grasp. As part of this, you have to make sure the players also get the opportunity to interact with the world in a meaningful way because, well, we're the PCs. We're the main characters, not background.
To that end, whenever running a DMPC you have to be really careful, because the DMPC isn't actually a PC, it's an NPC that is helping. So as a DM it is always a good idea to err on having the DMPC be secondary at everything. In this case, the situation presented is a problem: potentially hostile villagers have come to wreck our shit. This is an encounter, right here, on the tune of combat encounters. In fact it might BE combat, depending on how things go, but the important part here is that you've presented a problem to the PCs to solve: Solve the problem of the Angry Mob.
So, it's up to you as a DMPC to make sure to hold back on what the DMPC can do to let the players have a shot at it. Fortunately you have a perfect excuse; this might be just my opinion, but Shining seems a milquetoast sort of fellow. Charismatic, I'm sure, what with being a paladin and all, but not always extroverted. He seems introverted. Here is your perfect excuse to let someone else take the front lines, while you assist. It's a minor thing, it might just be diplomacy, it might just be talking, it might be a fight, but the important part is that the PCs did it. Here, we saw Bianca thought of hiding and Liz thought of diplomacy, and this is good cause it means we have lots of ideas to solve this problem.
Try to approach events in the idea of "Is there a problem?" followed by "How do the PCs solve this problem?"
Which brings me to immersion. Actually, we haven't played very long so I don't know if the world is inconsistent. Being strange and alien is fine as long as it is consistently like that, but it hasn't been very long. Actually, you have a slightly different immersion issue which is easy to fall for, and it has to do with both the number and the value of the skill checks involved.
First the number. You don't need to have as many skill check prompts. Actually I'd advise you do what I do. Unless they ABSOLUTELY need to (such as saying "You need to make a balance check now!"), don't prompt us. At all. We're smart cunning players. If we're looking at the Mysterious Rock of Mystery, we're gonna cast spells, make Knowledge checks, Appraise that shit and all of it. You can keep the DCs a mystery both so A) they don't know if they need to pre-buff to make it and B) they aren't interrupting the story. Because every time we're reading a story, immersion is broken any time you go "Story story story MECHANICAL PARTS story story story". You can't always avoid it, but you can minimize it.
I know this is text, so "Show, don't tell" doesn't technically apply, but think of the story part as "show" and the mechanical parts as the "tell" part.
Which brings me to the degree of the checks. Dem numbers be crazy yo. DC 50? Really? Mostly I just think you may not have a good scale of these things, much most things are DC 10, 15, 20, 25, 30, and maaaaaybe 40 for something really amazing. Let me put it this way. Elder Evils... the DC to know the unknowable see the unseeable row row fight the power? Generally around DC 40.
For say, the neutronium thing. I'd describe it's physical properties and not say "make a skill check". If someone DID make a skill check, then you can say "this is X". And the DC is probably just 30, AT MOST, or even just "impossible if you're not from a future world". And even if you fail you can still get info. "You don't know what new substance this is, but it's heavy, its weird, it does this and that...." So while no, you don't know this is compressed starstuff you do pretty know all you need to know about it anyway, it's base properties.
Right now, you're bleeding players, and you can't afford that. I think you can still pull up dude, plus I want to see Vampire & Scientist take over the universe, it looks like a funny plot we got going on here.
See if you can just write (detailed preferably) paragraphs of fluff and action, and pretend the pony is just another NPC in there in whatever NPCs are on the scene. And then leave it there, and see what happens with it.
I promise you, it'll work.
EDIT: Looks like more posts, glad to see you guys are talking. I hope this helps you.
