Sirines

Sirines are playful, fun-loving fey creatures who love to sing and dance.

Baldur's Gate
There are four Sirines with Kelddath Ormlyr  in the Song of the Morning Temple in the Temple area. No dancing, but each stands on a disk at the four cardinal points, singing. They can be pickpocketed for one Pearl each. If you attack Kelddath, they will immediately fight to defend him.