I'm just a legend

Don't be infatuated with elder sister.

This is a common online expression, which means poking fun at yourself or others and expressing a relaxed and humorous attitude. The "elder sister" in "Don't be infatuated with elder sister, elder sister is just a legend" refers to women, while "legend" refers to people or things that are said to be fantastic, but actually don't exist or are not so magical. Don't be too infatuated with a woman, she is just passed on too well. In fact, she is not so perfect and not worthy of infatuation. This kind of online language is often used to ridicule someone's narcissism or overconfidence, and it is also often used to show that he will not be easily confused by other people's appearance or reputation. This sentence is also self-deprecating, indicating that he will not lose himself because of rumors or comments from others.