Someone who appears to be a quite and shy person at first, but after a while will talk more than anyone in the room. They tend to be independent, stoic and level-headed, but are actually sensitive and long for intimacy.
"Wow, Jean, I never knew you were actually such a talker"
Best way to describe Jean, is "Fool him once, shame on him. Fool him twice, and you're world will crumble."