One from BFDI (Battle for Dream Island: TPOT) is reimagined with a tall, slender humanoid silhouette, trading her classic flat digit "1" shape for a formal outfit featuring a dark blue suit vest over a collared shirt, tailored trousers, and sleek black heels. Her long, flowing blue hair mimics the dramatic swoops of the numeral "1," complemented by two curling antennae with glowing spheres at the tips and a tiny yellow hair clip. As an Algebraalien, One lacks traditional arms, so she uses her reality-warping powers and telekinesis in place of hands to lift, grab, and manipulate objects around her. When enforcing compliance or punishing contestants who breach their contracts, she employs these cosmic abilities punitively—sealing victims inside inescapable energy spheres, trapping them within pocket dimensions, or distorting their physical traits. This eerie, handless mastery over her environment perfectly complements her cunning, soft-spoken, and calculating personality, framing her as a polite yet deeply deceptive deal-maker who patiently exploits others' vulnerabilities to serve her own enigmatic agenda. One was formerly nonchalant, calm and seemingly helpful. She constantly observed the contestants to learn their vulnerabilities, which she used to blackmail them into signing her deals, often for rewards she may or may not actually gave. One was easily irritable and got annoyed when people were hesitant or resistant to her and got enraged when people defied her, like Donut and Leafy do in "Last One Standing". The episode showed One to be incredibly cruel and manipulative, showing no remorse for the destruction and deletion of contestants that she was responsible for, as well as convincing Pencil to give her all of Two's and Four's powers via capturing her and thus making an upheld deal with her. She was also very power-hungry, conspiring to take Two (and later Four's) power and gleefully fidgeting with it when she finally gets it in "Last One Standing". Overall, One was shown to be vengeful and manipulative.