J is a name given to someone who doesn't share everything about themselves until they feel it is safe to do so. A J would tend to put others before themselves even if they didn't know you unless you are to harm their friends and family. Consider yourself lucky because a J is loyal to those that treat them with respect in their private life.
The best letter. The most amazing. Look at the way it curls.
Person 1: "I'm a J my guy."
Person 2: "Nobody asked."