Laetitia, The Little Mermaid: Laetitia, La Petite Sirène

Nothing differentiated Laetitia from the other little girls of her age. Nothing, absolutely nothing.
Yet, the river is her friend and at its contact a very strange metamorphosis takes place.
Will that power be enough to save Iridelle, a green-haired sylphid ? That's maybe what Laetitia wonders by dashing, brisker than a flash, in the blue turquoise of the river.