: Found by Bode in a portrait of his ancestor, Chamberlain Locke. When used on the "Ghost Door," the user's soul leaves their body, allowing them to fly and speak with ghosts.

: Kinsey discovers a monstrous "fear creature" lurking in her mind. By the end of the episode, she uses the Head Key to physically drag her fear out, stab it, and bury it in the woods—a choice that drastically changes her personality.

: While not used by the Lockes yet, it is revealed that Ellie Whedon possesses this key, which is used to summon "echoes" in the wellhouse. Mysteries and Clues

: Using the Head Key , the children discover that their minds manifest as physical spaces: Bode’s is a childhood arcade full of toys, while Kinsey’s is a vast, organized shopping mall .

Are you interested in a the children found in their heads, or Locke & Key season 1 episode 3: Head Games - Show Snob

: Nina mentions Bode's "imaginary friend" in the wellhouse to Ellie, causing a visible reaction of dread in Ellie, who later goes to the well and calls out to "Lucas".

: Reacquired by Dodge; it acts as a magical lighter that can set objects on fire.