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I crave pizza
App erin
Erin as she appears in Thief

Character Type

Major - Foil


The House of Blossoms (Formerly)
Madam Xiao-Xiao (Formerly)


The Baron
The Watch

"So basically it's okay when you do it but not me, I see, I get it, but you know that guard he's not going to wake up later and follow our trail to cause trouble."

Erin (aka Patient #18) is a major character in Thief, she is both a former pupil of Garrett and one of the closest things to a family member he has. Though a proficient thief (and even assassin) Erin is naive, impulsive, has violent tendencies, and relies heavily on tools such as The Claw as opposed to her stealth and tact which usually results in her killing any opposition instead of knocking them unconscious. This led to much friction between her and her former mentor in the past.

Background Edit

Erin's history prior to her arrival in The City is unknown, she came to the city when she was 8 as an orphan, stowed aboard a ship from shores unknown. She stole on the streets to get by until she was taken in by the affluent brothel and opium den, The House of Blossoms, when she was found by the proprietor of the establishment, Madam Xiao-Xiao.

Taken into the brothel, she was made a 'petal' by the name of Primrose. Erin spent many years doing things such as sweeping up after and carrying the pipes of various rich and famous clients, it was here she first met her future fence, Basso, as he made a delivery. After reaching the proper age Erin was graduated to a 'blossom' and was expected to service the clients who came to the brothel sexually however she murdered her first client and ran. This aggressive and rash way of dealing with problems has continued into her later years and remains a signature of her personality still.

On the streets once again, she went back to stealing to survive. One night Erin spotted a shadowy man on a rooftop and using her innate abilities snuck up on the cloaked figure, making a grab for his coin purse. She was detected however and the man grabbed her wrist, this startled her and she reacted by biting the masked man's arm and running, he let go and did not pursue her. This was the first meeting with her future mentor, Garrett.

With nowhere left to go she sought out Basso and introduced herself once again, this time by her real name of Erin. Basso chose to introduce her to a business associate, thinking the two would do some good for each other, Garrett then crawled through the window remarking with amusement that they had met previously.

Garrett took the girl under his wing, attempting to teach her all the skills he had amassed during his career. Erin was receptive to most of it, learning how to pick marks, infiltrate, and steal with great skill. Initially the relationship went well, but as time went on there developed friction between the mentor and pupil. Erin often lacked patience and made careless errors because of it, much to Garrett's chagrin. When the topic of killing would come up Erin would openly question Garrett's stance on never taking a life needlessly, resulting in heated and angry arguments between the two. These arguments came to a head one evening while on a job for Basso, while stealing some documents a guard went unnoticed in the residence. As Garrett inspected the mark they had come for the guard came across Garrett and moved in to kill him. Before Garrett could react Erin slit the throat of the guard in front of her mentor, shocked at how casually she could take a life Garrett chose to sever all ties with Erin who didn't see Garrett again until years later.

Erin privately considered Garrett one of the only people she could relate to and trust so her disappointment and anger with this abandonment is strong. Hurt by this perceived betrayal by someone she looked up to Erin set out on her own becoming a proficient thief in her own right, but also an assassin for hire. It was during this time she invented a mechanical tool she called The Claw, which she used for mobility and as a weapon against any opposition she came across.

Events of ThiefEdit

Several years into her career, she was commissioned to do a job by Basso to steal a gem known as the Primal Stone from Northcrest Manor.  She waited at a meeting place for another thief; a thief that turned out to be her old mentor Garrett.  While the two made their way to the manor across the rooftops, she could barely contain her excitement at first, expressing her joy at being reunited with her teacher.  Garrett, by contrast, once again began to see her mistakes and made several disappointed remarks about his former pupil.  This finally came to a head when Erin once again killed a guard in front of Garrett with her claw.  Angered by this, Garrett chastised Erin angrily for her callous action.  The old wounds being reopened, Erin became frustrated and hostile with her partner.  Killing another guard, Garrett decided to try and limit her ability to take life by stealing her Claw right from her belt without her knowing.

Reaching the skylight of Northcrest Manor, the two watched a strange ritual below being conducted, led by Baron Elias Northcrest himself.  Spotting the Primal Stone below, Erin moved to steal the object.  Garrett refused, deciding to call off the job and walk away due to too many unknown factors making the situation dangerous.  Erin, defiant, intended to go forward with the heist until Garrett revealed he had stolen her Claw.  As the ritual began below, Erin jumped at Garrett in an attempt to steal her weapon back from him.  The Claw was knocked from Garrett's hand onto the center of the skylight, and Erin followed to retrieve it.  Just as she reached the center the ritual below let out a burst of energy, causing the glass to shatter and her to fall.

Garrett leapt and caught Erin by the wrist.  She begged Garrett for the Claw, and her mentor reached for it.  As he reached her grip slipped and she plummeted below into the center of the ritual.  Hitting the flow of energy, she was suspended in air as energy surged into her.  The impact sent out another pulse causing the entire chamber to collapse.

Erin became infused with the energy of the Primal from the ritual.  By having the Primal inside her, she was tapped directly into the City's population.  Her emotional state feeding directly into everyone's subconscious, it slowly began to drive the citizens of the City insane.  This insanity became known as the Gloom.  Believing he could still use her, Elias Northcrest had her sent to Moira Asylum where he continued to experiment with her while she was heavily sedated.  However her prolonged presence in the asylum twisted the minds and bodies of several inmates and doctors at a more rapid rate, finally resulting in a bloody riot in which resulted in several inmates escaping and the asylum abandoned.  Erin seemed to disappear here.

A year later from the Northcrest Manor, Garrett believed his old apprentice to have died when he awakened from his coma.  However, as time went on Garrett began to see visions of his apprentice.  These images were in actually Erin reaching out to the Master Thief through his Primal infused eye, attempting to lead him to her.

Erin was in fact being held by the leader of the Graven Dawn, Orion.  He was in actuality Elias Northcrest's half-brother, Aldous, and was imprisoned at Moira by Northcrest.  While there, he eventually found out about Erin presence there and escaped with her during the riots.  Knowing of the Primal in Erin, Orion sought to use her blood to cure the Gloom in his followers and eventually the entire City.  However, he unwittingly was corrupting them with Erin's Primal fueled blood into monsters.  As he was conducting his ritual, Garrett stole the ritual book needed.  The two argued until the Thief-Taker General interrupted, with Orion retreating to his ship the Dawn's Light with Erin in tow.  It's aboard this ship that Erin finally stirred from her coma.

Finally lucid, Erin was angered about being used by Orion.  Erin turned the Primal energy onto her captor, corrupting him too rapidly and killing him, before turning her rage to Garrett and attempting to do the same to her former mentor for abandoning her. Attempting to reason with his apprentice, Garrett reassembled the Primal stone as Erin let loose multiple bursts of Primal light.  This energy expenditure exhausted her rapidly, giving Garrett the opportunity to use the stone.  However, when he finally closed the gap Erin let loose a final burst of energy, destroying the wall of the ship.  Erin fell off the newly created cliff and Garrett grabbed her wrist to prevent her from plummeting, mirroring the night one year ago at Northcrest Manor.  Erin begged Garrett for the claw while he reached to start the channeling of the Primal.  He succeeded in unlocking the book with the ring on Orion's corpse, but Erin slipped.  In a final act before passing out, Garrett threw the claw to Erin as the Primal reached for its host

When Garrett was awoken by the sunrise, the claw was embedded in the wood post next to him with some wet and bare footprints on the ground, implying Erin survived.


  • Erin is 19 years old during the prologue which takes place a year before the rest of the game, making her 20.
  • Erin is similar to Zaya, the female protagonist from the unofficial expansion of Thief 2: Shadows of the Metal Age, Erin like Zaya is a young skilled thief and is determined in rob the most valuable objects.
  • Erin appears to be loosely inspired by the girl at the end of Thief: Deadly Shadows. In the Dark Horse Comic, one image cell appears to even be a directly based on the scene with Garrett grabbing Erin's hand as she attempted to pick pocket him.
  • In the filenames in The Companion App Erin's images are listed as "ariel".

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