One

One is a light blue Arabic numeral one (1), being based off the design of the "1" with a base (𝟷), likely taken from the original Minesweeper. Also, a quirk regarding her design is that the diagonal part and base of the "𝟷" are misaligned, the diagonal part appearing more far off to the left (the degree to this varying between scenes). She is armless, a trait that makes her stand out from the other well-known Algebraliens. Due to her rather slim body, her eyes appear to protrude outside her body (this is not the case if she turns around). On some occasions, One's eyes appear slimmer and more tilted (generally giving her a more sinister look), including when she is enraged. Throughout TPOT and even in other official media, she often appears to carry her signature sinister smile. Sometimes, she may appear with a rounder or sloppier design.