Lottiana

Lottiana is the femslash ship between Tiana and Charlotte La Bouff from the fandom.

Canon
When Tiana and Charlotte were children, Tiana and her mother would come over to the La Bouff house so Tiana could play with Charlotte. Eudora (Tiana's mom) would read fairytales to them and Mr. La Bouff would request she make the dresses Charlotte would want, which she was very happy to do. One day Eudora read them the original story of The Princess and The Frog and while Charlotte was excited by the story, Tiana thought it gross and declared she would never kiss a frog. Charlotte then dressed her cat as a frog and playfully tried to goad Tiana to kiss him until the cat jumped onto the ceiling which they both had a good laugh about it.

By the time Tiana is an adult with a diner job, she is still good friends with the La Bouffs as evidenced by having Beignets already ready for Mr. La Bouff when he comes into celebrate being voted King of the Mardi Gras parade. Charlotte also comes with her father to tell how excited she is to be having Prince Naveen of Maldonia stay at her house for the Mardi Gras celebration. When Tiana mentions that she believes that the way to mans heart is though his stomach, Charlotte calls her a genius and pays her a ton money to provide her Beignets for the ball, which happened to be enough for Tiana to bid for the building she wants for her own restaurant.

Later at the ball, when Prince Naveen is very late, Charlotte starts freaking out and Tiana tries to get her to calm down. However, when Prince Naveen (seemingly) shows up, Charlotte perks right up and goes to dance with him and Tiana is visibly happy for Charlotte. However, the bank managers show up at the party they inform Tiana she was out bid for the building and Tiana trips trying to get them to stay and discuss, wreaking the food table. When Charlotte goes to get the Beignets, she see Tiana fallen and covered in food, so she decides to forget about the Beignets and instead takes Tiana inside to get her all cleaned up and give her some new clothes in the form of one of her princess dresses.

Much later, at the end of the movie, the real Prince Naveen is talking with Charlotte about how if she kisses him, he and Tiana will turn human again and in exchange he'll agree to marry her. However, Tiana (who has fallen in love with Naveen) tells him, she doesn't need the money, that she would rather be with him. Charlotte is so moved by this, she agrees to kiss Naveen so they'll turn back into humans then and then just let be together instead. However, since Mr. La Bouff's title as King of the Mardi Gras parade ends at midnight, that mean so does Charlotte's status as temporary princess and they miss the deadline. However, after Naveen and Tiana marry, they turn back into humans since Tiana is a true princess due to the wedding. At Tiana and Naveen's second wedding in town, Charlotte is the one to catch the bouquet.

Fanon
Lottiana is a common pair in the Princess and the Frog fandom, though not as popular as the main canon ship Tianaveen (Tiana x Naveen). The ship sailed as a result of the twos strong friendship through out the movie, highlight by how other people brush Tiana or her dream off where as Charlotte does nothing but treat her like her friend. Charlotte kindness has made her a beloved character by the movies fan. Both fans of the ship and fan who prefer them as friends love the positive representation of a friendship between a white woman and a black woman, especially for the time the movie is set in.