~One (TPOT) ~

One is an algebralian who made their first official appearance in the stinger of "Outbreak At Stake". Prior to that, they first debuted in "X Finds Out His Value" and was shown as a recommended character in "The Tweested Temple". They have their first major role in "What's Up Bell's String?", where they are seen kidnapping characters and making deals with them. They give off a friendly and playful demeanor, but seems to have somewhat sinister intentions.
Body colors:
Cornflower Blue (body)

One is a light blue Arabic numeral 1. One's color is similar to that of Four, except for the fact that their color is paler and she's armless unlike the other algebraliens.
She is the only algebralien that don't have any arms, hands, anything, Her just have the legs, but she use telepathy to lift up, hold, or interact with something.

One likes to “help people out”, such as when she gave Fanny a new mouth and gave Ice Cube new legs. However, her full intentions are still unknown, but it’s suggested that she wants to get ahold of Two’s Power some way or another; saying she has power, just not enough. Her deals consist of offering various contestants things they desire, in return of them doing a “favor” for her later on. This may imply a more manipulative and sinister side, thus supporting the speculation of her being an antagonist for TPOT.

During "Category One", she shows her more malicious traits, such as blackmailing Basketball into making a deal with the threat of making Robot Flower even more destructive. This, as well as the storm in general, shows her complete callousness and pragmatism, not caring about the well being of any affected and remarking on her boredom while Basketball made her decision. In addition, the way she kept Basketball and the eliminated contestants she kidnapped may imply that she is forcing her victims to make deals with her.

It is alleged that the deals One makes with the contestants consist of if the contestants that signed the deal wins The Power of Two, all power is given to her. This is supported by the fact that, like previously stated, she wants ahold Two’s Power.

Stalking, kidnapping, and making a deal/contract with people

Omniscience (debatable): One is somehow capable of recalling the names of Ice Cube and Fanny, even when they haven't met at all previously. Additionally, they were aware of Basketball's presence despite not being able to see or hear her. Though it is debatable that this ability is exclusive to all algebraliens regardless of knowing the contestants. It is also possible that One may have also just learned these names by just spying on them in a conversation when their names were brought up.
Super strength and/or telekinesis: In "Outbreak At Stake", she may have kicked a hole through the Moon in the second post-credit scene, or she used telekinesis to break a piece of it off. In "What's Up Bell's String?", she used telekinesis to hold Fanny's new mouth and the list she was holding, having names such as Bell, Bomby, Fanny and Ice Cube with a tick on the left hand side. She probably used telekinesis with her mind.
Nigh-Omnipresence: One can be seen being in some of contestant's dreams and hiding in plain sight in certain scenes. The contestant's dreams include: Black Hole, Pen, Winner, Barf Bag, and Book, but One is still in reality.
Manifestation/Transformation: When One shows up in TPOT 10, she can sometimes be seen as an object, engraving, outline, or any other inanimate thing. this is because One is in multiple places at once considering the dreams are taking place during the same time.
Warping: She's not just able to transform themself. In "Category One", she can also be seen changing the content on the whiteboard without interacting with it directly.
Teleportation: One is able to teleport herself and other people as seen in "What's Up Bell's String?".
Black Hole Immunity: When One was shuffling the contestants for Team Swap, she moves Black Hole effortlessly without being warped by his gravity.
Conjuration: One can create objects out of thin air, as seen when she conjures a document for Fanny to sign in TPOT 12 or creating body parts to offer Ice Cube and Fanny.

One never showed up sexual interest for something or someone, but she will not stop you from do it, only if she is uncomfortable. Her pussy isn't visible when she's not horny, being not visible or interactive normally. She can swap out too, like, her pussy turn into a cock, her cock is a 39 centimeters tentacle and it's color is a clearer color tan her skin. One can be both dominant or submissive, but she will accept being both anyway.