Abigail Riley

Abigail Riley, also known as X, is a character in the "Council of Eight" series.Abigail is an old friend of your character who traveled to London out of boredom. It was during this time that she met Pembroke and ended up as a sex slave to the Council of Eight before she managed to gather information of their crimes to blackmail them with and went into hiding, using the alias "X".

She ended up luring you to London claiming she was in danger. After you discover the truth about The Council and their crimes she reveals herself as X and forces you to pretend that you were the one blackmailing Pembroke.

In Episode 17, she ends up killing Pembroke and takes you as a hostage.

She escapes justice at the end of Episode 18 and she is shown talking to an unknown person on the phone. It is mentioned that she is still a fugitive a year later, hinting that she may return in a second season.

Trivia

 * Her crimes include kidnapping, blackmail, murder, and assaulting an officer of the law.