Often when I was a child and my mom would introduce me to some of her old friends at a different congregation, she would announce to them: “Oh, he’s shy,” while she grinned and made a little chuckle at them. (Yes, I am, in fact, a classic introvert, and also diagnosed by two doctors as having Aspergers Syndrome.)
Just to reiterate: The absolute worse thing to do to an introvert (or shy or Aspergers person), for Christ’s sake, is to actually announce to other people that ‘we’re shy’!