Maybe she has experienced an unforgettable regret in her life, so she will give her a personal signature like this.
And her screen name also said that if there is no memory, it means that she has a memory, and this memory should be beautiful and has great shortcomings.
It shows that there is one person left in this girl's memory. She hopes that the other party will not look back. He wished he could stay where he was and wait for their good times.