[Reasoning] You roll a 19 (required 10). Success!

Despite the creature's warning, you decide not to turn back. Instead, you try approaching it once more — this time more cautiously —, and signal that you mean no harm.

Your friends follow behind you from a safe distance, some more reluctant than others. With Dawn Break's light closer to the creature, you become able to identify it as a siren.

Siren: "Fine. But if you try anything, there will be consequences. Now, what do you want?"

You introduce yourself to the siren, and ask her what she is doing in this cave.

Siren: "What's it look like, that I'm here by choice? Why, it was ponies like you who trapped me here with your magic! And for what, being evil? (snort) Your so-called heroes will brand anyone as monsters if it brings them just a little bit more glory..."

Sea Swirl: "To be fair, I've met nicer fish—"

Sweet Biscuit: "Shhh‼"