Talk to her, you fool

You can easily bluff your way inside.

"Hi, if you or a loved one has been diagnosed with Mesothelioma, you might be entitled to financial compensation."

Or maybe not. This is where your years of isolation with no one to talk to but a computer and mute mutated versions of yourself is starting to show. This was your first idea for a conversation.

"P-pardon me?" the woman just asks flabbergasted.

"What I mean to say is, I'm here as a medicinal advisor, and I'm here to investigate whether you or anyone living in this property are at health risk by the order of the authorities. Could I ask ma'am, do you live alone?"

Where the bloody hell are you going with this?

"Why, y-yes. I do." she says. You are at this moment roughly 67% sure that she is lying. If she is truly held captive here, that means that the beast is either right behind her threatening her, or it has manipulated her in such a way that she is now feeling attachment to it. Stockholm syndrome and all of that.

"Well, I will need to look at your property ma'am." you reply insistently.

"Why?" she asks.

"Well, because we believe that this terrible disease has been spread via pests. Tell me do you suffer from any problems with insects, rats, giant beastmen, ferocious monsters, manimals? That sort of thing?"
The look on her face when you mention beasts betrays her cool act of composure. You are now roughly 82% sure she is lying to you.

"What are you talking about? Beasts? Giants? Would you please leave this place?" she doesn't seem to like the idea of you coming inside the castle.

"I am afraid I will have to investigate inside ma'am. Or else I'll have to put this property under alert for danger, and then I will have to gather the people of the nearby town and clear this property by ****."

"I... I... I don't..."
Aaaaaand a full 100%. This lady is acting fishy.

"Move." you command and the poor girl does so without thinking. You move inside.

"Y-you can't do that!" the woman yells after you.

"I can and I will Miss...." you say trailing off at the end to make the woman finish the sentence.

"Belle, but that's besides the point you need to lea-" Belle's plea is cut short by you getting lunged in the side. Your holo-disguise fades in and out, revealing and disguising your true self with short intervals. Realizing that the jig is up you lean yourself back up and fish the pistol out of your holster, but before you can point and shoot, the beast is over you again and hits you making you drop the gun and you fly across the entrance hall onto the stairs. The beast is ferocious and big, and there is no way you will win against it in a fist fight, even if you were at full energy, and if the beast didn't have the drop on you. You call in the Undercloverbots you had standing outside the castle, but they won't make it in time. Has your quest really ended this soon? The beast prepares to swing its arm at you once more.

"PLEASE STOP!" Belle yells out in panic, and surprisingly the beast stops. There is a dynamic here that you still haven't figured out. A beast is surely the villain, no? It has to be.

While you are not in any immediate life-threatening danger, things are looking a bit dire, and you have to either talk your way out of this one or face the consequences.

"GET OUT!" the beast roars, and while part of you is inclined to follow its instructions it would still put you back at square one.

"Oh trust me, I'd love to, but my work here is not quite done. You see, I wanted to see for myself if the rumour that Belle was held captive by a beast was true. However, I intentionally decided to try to find a way to cooperate with said beast."

"Cooperate?" Belle asked carefully.

"Yes. You see the village is in need of a ruler of sorts. Someone in charge."

"Oh, I'm sure Gaston is doing just fine doing that." Belle replies.

"Gaston, is that the boisterous huntsman?" you ask. She just nods. Belle seems smart. Civilized. Not one to solve things with ****. She may even be a bit of a nerd. You decide to use that against her.

"Well, he seems... primal to me. We need to further the provinces into the modern era. I can supply that, but we need someone who can enforce change. We need both the smarts and the brawns here. You can rule over this place if you help me. You want have to isolate yourselves here."

"And if we don't help you?" the beast growls.

"Then you will **** me to tell the town about you and this place."

The beast is fuming, but is visibly holding itself back for Belle's sake. You have at this point come to the realization that the beast is not the villain of this story, which is bad news for you. It might actually be this Gaston character. The person you pinned as the hero. Could it be that the whole premise of this world is in reverse?

"I'll throw you in the dungeon." the beast yells. It beats ****. You can probably find a way to escape this place.

"But..." Belle stammers: "Maybe he can help you with your curse." The what now?

The beast growls annoyed at Belle, presumably for dispersing that information within your earshot. He then picks you up. You don't have the strength to fight back. You can either try to convince them to let you go by helping them to find a way to lift the curse, or you can accept your fate for now, get imprisoned and then break free later to team up with village to defeat this beast.