my understanding about what an extrovert is (a person who gets energy from being around people) an introvert (is drained of energy by being around people)

Going by that logic DD7 is an extrovert and DD5 is an introvert. This is not saying either is shy (far from that) but it seems like dd7 feeds off of being around people even if she isn't the center of what's going on, and the reverse for dd5 she's more fragle and needs rest after being around alot of people.