People who make something square or who try to make something fair or honest.
Squarers are usually seen as good because they are trying to make things right.
Examples:
The squarers measured the sides of the box to make sure they were the same length.
The squarers wanted to make sure everyone had a fair chance to win.
She is one of the squarers who always tries to do the right thing.
The squarers made the game fair for everyone to play.
The squarers made the building so perfect, it looked like a giant box.
The squarers always make everything right, just like magic.