Keyhole

Keyhole is a character in Gravity Falls, apppearing in the episode "Weirdmageddon Part 1."

History
Keyhole was one of the monsters that entered Gravity Falls in "Weirdmageddon Part 1", and later followed Bill to the Fearamid.

Appearence
Keyhole has a blue, humanoid body, with a head that resembles a keyhole. It has a darker shade of blue around its eyes and a pink nose.