|Introduced in||"The Enchiridion!"|
|Voiced by||John Moschitta Jr.|
The Key-per affirms Finn's choice; this is the answer to the riddle and the same conclusion that previous adventurers reached to enter.
Key-per is a very fast talking person, same as Book-o in "The Lich" and his speeches are usually difficult to understand because he speaks so fast. He is the gate keeper to the pathway of The Enchiridion. After defeating the Dark Magician, Finn, in his rage, sees Key-per in red, devilish pajamas, mistakes him for another trial, and punches him in the stomach. The Key-per then explains that they're pajamas. As shown in the conclusion of the episode, Key-per seems to be very good at cooking.
It is quite possible that the Key-per is a miniature variant or subspecies of a Door Lord, considering their similarities in function, power, color, and facial features.
The Key-per is described as tubby, has yellow skin, and wears a baby-blue robe. He also wears a key-shaped necklace and a hat with the shape of a backwards F (resembling an old skeleton key).
Greetings, young heroes-to-be! This mountain is called Cragdor. It's purpose is two-fold; to protect the Enchiridion and to test the hearts of those who seek to possess it!
Many noble challengers have entered and attempted to pass the wholing trials that lie behind these walls, but no one has ever left here alive or dead!
Oof! These are my pajamas! I was getting ready for bed.
- His name is a pun and a portmanteau of the words key and keeper.
- Key-per is voiced by John Moschitta Jr., who previously held the world record for the world's fastest talker. Moschitta is also known for voicing Blur from another Cartoon Network Studios series, Transformers Animated.
- In the game, Righteous Quest, Key-per shows up twice: once in a red robe, and once in his original blue robe.
- The Key-per bears a strong resemblance to the Door Lord, but they serve opposite purposes: one unlocks existing doors, and the other creates them. The Key-per is small, and wears robes and a key hat. The Door Lord is tall, and wears nothing and a door hat.
- The color and shape of his one-piece pajamas strongly resemble a stereotypical demon. Finn mistook him for a threat because of it.
- It seems that Book-o is the same species as Key-per.
- Key-per looks more feminine and much older in his concept art.