They say, "Don't go into the bog." They say, "People who go into the bog never come back." They say, "An evil witch lives there, and all who go in there fall under her spell and are never seen again."
But you know better than to believe silly superstitions don't you? Tales of bog witches and goblins and whatnot are all just silly stories people make up to explain disappearances. People don't come back because they aren't careful and don't know how to spot quicksand and sinkholes. But you're a seasoned traveler and you know how to do that, so you'll be fine.
At least, that's what you thought when you went into the bog. But now you're lost, and their warnings keep coming back to you.
And you swear you hear the sound of rain, and with it, a chorus of frogs and toads, but there's no rain. You hear it in fits and starts, and you kept looking up to the sky to see if the rain was starting. At first, you thought you were hearing things, but then it kept happening. And now, it's getting louder.
And then she comes out of the trees, dark-haired, cloaked, and sneering. She carries a rainstick in her hand and every time she turns it over, the toads that swarm around her feet croak in response.
You turn to run, but it's too late! You've already heard the song of the swamp. The sound has been seeping into your mind for almost half an hour now and you can feel it's grip on your brain. You slow after your first few steps, and your movements grow sluggish. Unable to stand, you fall to your hands and knees. You make a last attempt to stop your ears, but to no avail. The song overwhelms you, until it is all you can hear.
But now the melody sounds sweet! It captivates you, fills you with peace. You want to sing along, but oh! how terrible! Your voice is no good for croaking. The sounds you make are poor imitations of the wonderful song you hear. It takes you several agonizing minutes of practice before you begin to sound even close to correct. But once you do, you're so happy! You can sing along with your brothers and sisters, as you always wanted to. Overjoyed, you crawl to them, joining them as a member of the choir.
You look up into the smiling face of your mistress. She scoops you up in her hands and raises you to her face, where she kisses you lightly on the snout. And with that kiss, you are hers, now and forever.
Croak, croak, croak, croak . . .

This is my first attempt at an original character. Well, sort of an original character. I mean, I got the idea from an uncommon enemy from FF4, but I expanded it quite a bit.
The bog witch . . . nobody knows her real name. She's been in the bog for as long as anyone can remember, a constant danger to travelers, especially those foolish enough to venture too deep into the bog. If she even remembers her own name, she never bothers to tell it to anyone. At least, not to anyone who could share it.
The bog witch hates people. What tragedy occurred in her early life to make her hate people so much is just as unknown as her name. But her hate of people drives her to attack all she sees. But she doesn't kill, oh no! Killing is not her way. The bog witch is a powerful sorceress. The rainstick is her magical focus, by which she commands the toads that are her totem animal. At her command, they sing for her, and all who hear the song are ensnared by her magic and compelled to join the chorus . . . as new toads. The spell completely hypnotizes its victims so that they believe that they have always been toads, and believe they are happy as toads, making it very hard to break. The victims actively resist attempts to break the curse on them, not that many people have the chance to try. If they've gotten close enough to try to break the spell, they've already been listening to the song, letting it worm its way into their thoughts. They may get off a half-hearted attempt, but they won't have enough focus to really do much. They'll be toads, just like the others, and revel in the joy of singing for their mistress.
Forever . . .

On a side note, if I ever decide to draw a character who's barefooted, smack me upside the head. If I still want to after that, at least I know I'm committed.

Edits: I realized I forgot to add some patterns to the yellow parts of her clothing that I meant to be there. And with some advice, I've edited one of her arms to make it what I hope is the appropriate length.