One, or 1, is a Numberblock character with one block. She is the protagonist of Numberblocks. She first appears in the episode with the same name. She is voiced by Beth Chalmers. One has one dark red circular eye and mouth. She also has a gradient that goes from red to dark red limbs. One is very extroverted, sweet, curious, helpful, bubbly, friendly, and childish. She loves finding singular things and normally calls them "one of something", while the other Numberblocks would usually call a sing

The Numberblocks are a race of living counting blocks from the fictional planet Numberland. They seem to have no hands with fingers and feet with toes (Except Five and Ten who had gloves). They each have a symbol called a Numberling that floats on top of them, and that represents the number of blocks they're made up of. They can do maths with themselves or with other Numberblocks, such as adding or subtracting. It is a mystery where the Numberblocks came from, but one day, a single, small red bl