U is a striped cyan Alphablock who wears a cyan hat or cap, eyeglasses, and bright blue shoes.Internally, U often feels like a doormat to the other Alphablocks, as bad things happen solely to him. He also might get fed up with Q but starts to stand her in later. U is also a bit shy and doesn't like trying new things. His character design might be inspired by the fact that the sound is like the Uhhh... line when a character is a bit timid ,he is from the alphablocks series,He is shy but can angry