Appearance and Character
The beautiful Merling Queen is never seen without her Mermaids, young maidens in the blush of their first flowering, to hold her hair and veil. Like every Braavosi courtesan, she has her own barge, and servants to pole her through the canals of Braavos to her trysts.
One of the Merling Queen's Mermaids drowned at some point.
A Dance with Dragons
Arya Stark informs the kindly man that the Merling Queen has chosen a new Mermaid to take the place of the one that drowned. She is the daughter of a Prestayn serving maid, thirteen and penniless, but lovely.