The Identity Key is a powerful key used primarily by Dodge to change her appearance.
It would later be used by Dodge when Ellie Whedon summon Lucas' Echo to change her appearance to that of a female. Dodge uses the key multiple times after this to change her appearance between that of Lucas, the woman and Gabe.
When she finally has the Crown of Shadows, Dodge uses the Identity Key to change Ellie's appearance into that of her female appearance, thereby giving the illusion that Ellie is Dodge. This causes the Keepers of the Keys to throw Ellie through the Black Door instead of her.
Dodge subsequently keeps using the Identity Key to switch between her forms as Dodge and Gabe. After Dodge is finally killed with the Alpha Key, the real Lucas returns the Identity Key to the Lockes. Having escaped from the Black Door, Ellie uses it to transform herself back to normal. A week later, Tyler leaves the key with Kinsey before departing on a road trip.
The Identity Key allows the user to change their appearance to any form they wish when inserted into the bottom of their chin. They can change all aspects of their identity, including gender, look, and clothing. The key can also be used forcefully on somebody else to change their appearance.
The same form can be used more than once, for example, when Dodge used the key to transform Ellie into a mirror image of her assumed form. The only drawback to using the key is that the Identity Key cannot turn its user into a person who already exists.
- The Identity Key strongly resembles the Skin Key from the graphic novels.
- It shares its powers with the Skin Key and the Gender Key.
- Along with the Matchstick Key and the Mirror Key, the Identity Key was made specifically for the Netflix adaptation; it does not make an appearance in the graphic novels, nor has it been mentioned there.