She appeared just outside the restaurant on Park Road, mainly laughing at Pauly. Professor Layton found her to be very impolite and unhelpful, and ignored her when she told them that Lady Dahlia was using him and Luke so she could have the Golden Apple for herself.
Chapter 9: The Tower's Secret
Adrea was one of the residents woken up by the destruction of the tower, and crowded around Layton and Luke while they waited for Flora to wake up.
She, like other residents of St. Mystere, gave Layton and Luke puzzles on their adventure. The puzzles that are given by her are "Puzzled Aliens" and "Which Job?".