Aya

Aya is a child prostitute at at brothel in Braavos. It isn't clear if she is actually a career prostitute or just a servant girl working at the brothel. Meryn Trant rejects all of the other prostitutes presented to him by the brothel's madam,

Season 5
The Braavosi Madam is present when Ser Meryn Trant visits the brothel she works in, seeking for a prostitute. She presents three prostitutes to him, but he claims that they are all too old. Realizing with some distaste what Trant is seeking, she presents him with a very young serving girl. Trant informs the madam that he expects a "fresh" one tomorrow night, again to her distaste. Throughout the exchange, the Madam is vexed by the presence of Lanna, a young oyster-seller, so deep in the brothel, and warns her not to show up there again.