Guido, Petrie, and Petrie's siblings rescue her just in time but they accidentally drop her and Cera saves her before she lands in the river again. Tricia then says her first words, which is "Cera".
Guido, Petrie, and Petrie's siblings save their sister from falling into the river, but they drop her, and Cera catches her just in time.  Tricia then utters her first word, which is "Cera."