Ah, dear little cutie, I, a fairy, have specially found some classic movies or animes about knights protecting princesses for you, including: 1. Cinderella-a fairytale movie with a prince on horseback protecting Cinderella. 2. "Misaka Mikoto's Super Electromagnetic Cannon"-anime. The male lead, Misaka, protects the female lead, Mikoto. 3. [Tomb Raider]-a live-action movie. The female lead, Laura, was protected by a knight. 4. Frozen-- 5. "Magic Knight"-- 6. King of the Brave Omega-- I hope you will like my recommendation. If you have more information, feel free to look for me. Muah ~