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  === Jaqen H'ghar ===
  Jaqen H'ghar is an alias used by a member of the Faceless Men, a society of assassins who follow a personification of death known as the Many-Faced God.  In ''A Clash of Kings'', this Faceless Man is posing as a Lorathi criminal from the black cells of the Red Keep given to Yoren's convoy to join the Night's Watch.  During the journey, he was locked in a wagon cage along with two other criminals, called Rorge and Biter.  He later meets Arya Stark, who frees him and the two others when the group is attacked by Lannister forces commanded by Amory Lorch.  In gratitude, he promises to kill for Arya any three people she names.  After Arya extorts him by naming him as the third name, Jaqen reluctantly agrees to help her stage a prison riot in Harrenhal that overwhelms the Lannister garrison and frees the northern prisoners. After that, Jaqen magically changes his face in front of Arya and offers to take her with him to Braavos. When she demurs, he gives her a Braavosi iron coin and instructs her to say "''valar morghulis''" to any Braavosi people should she need help finding him.
  Later in ''A Feast for Crows'', an alchemist with features identical to Jaqen's after the face change appears in Oldtown and bribes a Citadel novice named Pate to steal Archmaester Walgrave's keys (which can gain access to any door in Citadel). After Pate completes the trade, he dies of poison. Pate (with a completely different personality) later appears to greet Samwell Tarly when he meets Archmaester Marvyn.
  In the HBO television adaptation, Jaqen is portrayed by German actor Tom Wlaschiha.