Curate, connect, and discover
When she first arrived in Gravity Falls, Rania thought it would be safer not to tell her real name, and so she kept it a secret. She knew it was stupid -maybe she was being too paranoid- but she couldn't come with something better than "Mel Pomeni" as a fake name.
However, she would lose nothing trying to get to know the place better, especially since she's supposed to stay here for some time. She heard about the Shack, people told her it was some kind of weird museum. She loves antics, so nothing was stopping her from going there.
Plus... what could possibly happen ?