character
n.  

1. What a person is really like.  Their values, personality, and level of integrity...when no one's looking.

2.  One's moral compass.
"...judged not by the color of their skin, but by the content of their character." --Martin luther king"

"Our employees are commited to treating you fairly, and are posessed of the highest character."

LACKEY: "The guy can't be bought.  He's got character"
CRIME BOSS:  "We'll have to wack him then."