Rosanna

Rosanna is a young woman whom Reginald tried to propose to but was interrupted by Stan Pines' ill timed marriage jokes.

History
She and Reginald are first seen eating at a picnic table in the beginning of "Tourist Trapped."

She is formally introduced when Reginald tries to propose to her in "The Legend of the Gobblewonker" while the two are boating together. However, they are interrupted by Grunkle Stan, who bothers them with a cynical joke about marriage.

She is seen angrily leaving the re-opening of the Gravity Falls Wax Museum in "Headhunters."

In "The Hand That Rocks the Mabel," she and Reginald are both seen putting money into Stan's "Sack of Mystery," and then later seen walking to the Tent of Telepathy and watching Gideon's show, where Rosanna catches Gideon's cape when he throws it to the audience. This causes a minor scuffle among some of the older women. They are also seen eating at the restaurant where Gideon and Mabel are having their date.

Rosanna is seen in "Irrational Treasure," watching the Pioneer Day ceremony headed by Pacifica Northwest and cheering along with everyone else when Mabel Pines starts a patriotic chant.

In "The Time Traveler's Pig," she and Reginald attended the Mystery Fair and rode the Tunnel of Love and Corndogs.

She also attends the Sev'ral Timez concert at the Gravity Falls Civic Center and Buffet in "Boyz Crazy," hiding her eyes with sunglasses and wearing a "Sev'ral Timez" T-shirt.