Paulina (born on February 14, 2003; age 13) is a character that first appeared in Bowser Junior's Summer School 5. She's the sister of Toad who Bowser Junior falls in love with. She is actually Toadette from Mario Kart: Double Dash!!, Mario Kart Wii, Mario Kart 8, and Mario Kart 8 Deluxe but she speaks with a deep Brooklyn accent, much like the Brooklyn firefighter.
Paulina was brought to school by Toad to help him cheat on his test by having her write the answers for him. Bowser Junior and Joseph tried to hit on her but Toad stopped them. When Toad finishes his final exam and completes summer school, Paulina kisses him on the lips.