Sue Pea

Sue Pea, the Dozing Girl is a seven year old portrait ghost that died in her sleep. Her name is a pun on either "pea soup" or "soupy". During the events of Luigi's Mansion, Sue Pea resides in the Guest Room on the second floor of the titular mansion, where she sleeps on a bed attached to the room's ceiling. She is one of the five optional portrait ghosts.

Upon first enterring the room, Sue Pea implores Luigi to go away but does not otherwise react to his precense. Examining her with the Game Boy Horror reveals that she promises to never wet the bed, giving a clue on how to provoke her. To do so, Luigi has to spray water from his Poltergust 3000 at Sue Pea, which can be done after vacuuming a Water Elemental Ghosts produced by a vase in the adjacent room. After spraying her three times, Sue Pea's heart is exposed and Luigi can pull her in with the Poltergust. While being vaccumed, Sue Pea attacks by tossing dolls, dealing five Hit Points of damage with each successful hit. If Luigi fails to capture her, she resume sleeping and Luigi has to douse her with water again.

After capturing Sue Pea, the Guest Rooms light activates and a treasure chest appears on the ceiling, out of reach. Leaving the room causes a quake to happen, and returning to it shows the guest room is now right-side up, with the Treasure Chest now accessible, The chest contains a Gold Bar and a Silver Diamond, and other minor treasures.

Trivia

 * A black-and-white picture of a person similar in appearance to Sue Pea can be found on the north wall of the Guest Room, possibly depicting her when she was alive.