What is a symbol for loyalty?

Question

It cannot be a symbol such as one in Japanese. I need to place it onto the U.S. Constitution. Please, help me out!

Answer 1

In Western heraldry "loyalty" is traditionally represented by the colour azure blue used as a background colour ("field"), and/or a dog in the foreground.

Answer 2

someone did ask this Q. before, so here is the link,it might help you.