Mysterious Undiscovered 5

Mysterious Undiscovered 5, or just "Five", is a character in Numberlemon.

Appearance
At first, she was (probably) black, with black limbs and a question mark as her face.

During the first episode of Five's Quest to Discover Herself (The Experiment), redesigned her so that she has an actual face as well.

Trivia

 * The only reason she was created is that we need a 5 that can add up and being added up to, because can't add up...
 * She appears less frequently in seasons 3+, because +5 orbs can add 5 to any number.
 * She hates being in an F-shape because it reminds her of failure.