Make the Dulce de Leche filling: in a large bowl, using the mixer on medium speed, beat the cream cheese for 1 minute. Add the Dulce de Leche, the vanilla extract and the media crema or sour cream. Keep beating until all the ingredients are fully integrated, occasionally scraping the sides of the bowl with a spatula.
Bloom the unflavored gelatin in a small bowl by adding 1/4 cup of cold water. Let it rest for 5 minutes. Then melt it for 15 - 20 seconds in the microwave, until melted. Let it cool down a bit, while you stir it, making sure there are no clumps left and then add it to the Dulce the Leche mix, still beating with the mixer, until fully integrated.
Spread a bit of the Dulce de Leche mix to the walls of an 8" springform pan. Line the sides and bottom of the pan with ladyfingers. Line the sides with the convex side of the ladyfingers pointing out (this is only for aesthetic purposes). The Dulce de Leche on the walls will make the ladyfingers stick and stay up. Fill the inside of the ladyfinger wall with the rest of the Dulce de Leche mix. Cover and chill in the refrigerator for at least 2 hours.
Carefully unmold your Charlotte. Whip the whipping cream until firm peaks form. Set aside about a 3/4 - 1 cup portion and color it red with the food coloring. Using an offset spatula spread the rest of the whipped cream on top of the dulce de leche filling and spread it evenly. Drip the blue cake drip on top of the white whipped cream. Pipe the red whipped cream however you wish. Alternatively, you can use strawberries and blueberries for garnish. If you desire, tie a red, blue and white ribbon all around the ladyfingers. Enjoy!