| Full Name
|| Miss Petunia, the Bathing Beauty
|| The Miss Ghost runner-up from six years ago. She hasn't had much modeling work lately.
| Heart Quote
|| Ahh...a piping hot shower!
Miss Petunia, the Bathing Beauty (Japanese: ミス・ブーニャ Miss Būnya), is a portrait ghost of unknown age from Luigi's Mansion. She was the "Miss Ghost" runner-up from six years before the appearance of Luigi's Mansion in Boo Woods. She has not done much modeling work since and has gained a lot of weight. In fact, besides being overweight, she also has pig-like features, including a pig snout, hooves for hands, and a pink hue. Wearing her showering cap and bathing suit, Miss Petunia spends her time in Luigi's Mansion taking showers in the Bathroom on the second floor. She is captured by Luigi during his search for Mario.
Miss Petunia resides behind the shower curtain when Luigi enters the room. If Luigi pulls back the curtain with the Poltergust 3000, Petunia shoots a blast of scalding hot water at Luigi, delivering ten HP of damage. When Luigi gives her a blast of ice using the Ice Elemental Medal, the ice causes Miss Petunia to sneeze, making her vulnerable, and Luigi sucks the ghost in with the Poltergust. After capturing Miss Petunia, Luigi acquires the key needed to open the door to the Billiards Room.
 Physical Appearance
Miss Petunia wears a multicolored bathing suit with a matching shower cap. She has pig hooves for hands and a matching pink nose. She has a sideways oval shaped head with a very distinct chin. She has hot pink skin and small yellow eyes with long black lashes.
 Names in Other in Languages
|"Bū" is the onomatopoeia for pigs.
||Señorita Begoña, La Belleza de la Bañera
||Miss Begoña, The Bathing Beauty
||Mlle Métunia, La Beauté dans le Bain
||Miss Metunia, The Beauty in the Bath
- According to Nana's diary, the grandmother ghost once played a practical joke on Miss Petunia by filling her bathtub with ice while the former "Miss Ghost" runner-up was away. When Miss Petunia returned to her bath, she was in for quite a shock. This diary entry gives Luigi a clue on how to capture Petunia.
- In an E3 2001 beta presentation of Luigi's Mansion, Luigi enters the bathroom in which Miss Petunia is ordinarily bathing in. While her silhouette is visible, when Luigi opens the curtain, no one is there. This could be purely to add a bit of eeriness to the game, or possibly Miss Petunia needed to be exposed by other means. Before Luigi enters Miss Petunia's bathroom, he exits the dining room from a door on the opposite wall from what appears to be the door to the Sealed Room. In the final version, the Dining Room is on the first floor rather than the second. A video clip containing this content can be found here.
- When the curtain is closed, Miss Petunia's silhouette is a thin, svelte figure washing her hair, until the curtain is moved, revealing her actual figure. Her silhouette is possibly how she looked in her "Miss Ghost" days.