Marei

"Now, as it happens, Marei... is quite the spear-handler herself. She's here to thank you for staying by my side as the battle raged all around me."

- Tyrion Lannister to Podrick Payne

Marei is a character in the second and third season.

Season 2
She is a new prostitute in the brothel owned by Lord Petyr Baelish. She is training with a male prostitute and receives instructions on how to act aroused by the veteran Ros.

Season 3
Marei is one of the three prostitutes hired by Tyrion Lannister to service Podrick Payne as a reward for saving his life in the Battle of the Blackwater.

In the books
In the A Song of Ice and Fire novels, Marei is a prostitute at Chataya's establishment.