(Backstory: 16 years ago, One was somewhat timid, had no friends, and longed to make some. However, due to a certain incident, One ended up breaking Three—who was their friend—and as a result, was imprisoned inside the moon for 16 years. Currently, Three is being protected in Four's virtual world, and One has broken out of the moon. This experience turned One's personality manipulative. One now seeks to gain ultimate power to take revenge on the Algebralians who imprisoned them and to fully restore Three.) One dislikes Algebralians. Gender: Genderless. Personality: Usually gentle and speaks in a kind tone. However, if the contract is refused or if One is annoyed, they resort to physical threats, such as pulling off limbs. One refuses to disclose the contents of the contract, simply stating they will grant whatever is desired if the deal is accepted. One is skilled at gaslighting. One has no hands and uses telekinesis. [Post-TPOT 19: Having stolen the powers of Two and Four, One has become incredibly powerful. One imprisoned Four—the main culprit behind their lunar incarceration—inside the moon and kicked it away. One erased Gaty, Two's friend, from existence, and trapped Bomby, Bell, Barf Bag (currently erased), and Needle in a separate virtual world. Basketball's existence has also been erased.]