I think a trait of Trucy Wright is most interesting is the fact that she is a genius. Phoenix says as much. Throughout Ace Attorney 4 she is far ahead of Apollo, already being so far ahead, waiting for Apollo to catch up. Trucy is not just perceptive because of her powers but she has her own skills of deduction. She's much like Mia Fey in that aspect, co-council knowing more then the attorney trying to guide them to the answer on their own. This is what differs her the most from other weird girls in Ace Attorney, the obliviousness is just an act.