H-Digit
The H-Digit is the one who’s so plain you think they’re a typo in the universe.
My friend is the H-Digit of our group. He wears the same shirt every day and still doesn’t know who Taylor Swift is.
She’s the H-Digit of the class. She sits in the back and eats cereal for lunch.
He’s the H-Digit of the whole damn school. Nobody even notices him.