Ran Bing is a character in the cartoon Linglong. She was kind and optimistic since she was a child. After witnessing the cold rules of the lighthouse, she began to hate the breeding mission of the lighthouse. In the process of fighting and living together with Mark, she gradually developed different feelings for Mark. At first, she didn't understand what this feeling was. After reading the diary of her dead teammate Penny, she knew that her feelings for Mark were old-world love. This made her even more disgusted with the breeding task of the lighthouse. After confessing to Mark that there was no result, she decided to accept the breeding task, but in the end, her feelings overcame the rules and refused to carry out the breeding task in the Golden Hall, and then she exchanged views with Mark who came to the rescue.