Song of Dark Light

In the introductory chapter at the beginning, the interaction between the sister and the brother is not enough. It is inconsistent with the love and attachment of the sister to the brother after time travel, giving people an incongruous feeling. People who time travel have to maintain their previous feelings, personalities, and preferences, so that they can easily give readers a sense of substitution. What do you think? It is recommended to rewrite it, for example, first to show the good relationship between brother and sister. The younger sister originally had love and attachment for her older brother. The cause of death was changed to the younger sister accidentally falling into the water. The older brother, who was not good at swimming, desperately tried to save her and died. Because the older brother had lifted the younger sister to a small branch, which was temporarily safe, he lost consciousness and sank to the bottom of the water. Therefore, he did not suspect that the other time traveler was his younger sister. The younger sister desperately tried to hold on to the unconscious hand that was gradually sinking, which caused the small branch to break and fall into the water again. Do you think this would be more harmonious? If you want to describe the relationship between brother and sister in the future, you can rewrite it as brother and sister who are not biological brothers in a reorganized family, but they have had a good relationship since childhood. Do you think it is suitable?