Forever the butterfly reads the answer

It was raining at that time, and the asphalt road was wet and cold. Green, yellow, and red lights were flashing. We took shelter from the rain under the arcade and watched the green mailbox stand alone across the street. In the large pocket of my white trench coat was a letter for my mother in the South. Sakurako said she could go over with an umbrella to help me send the letter. I nodded silently and handed the letter to her. "Who told us to only bring a small umbrella?" she said with a smile as she held up the umbrella and prepared to cross the road to help me send the letter. Raindrops slid down from her umbrella and splashed on my glasses. With a screeching sound of brakes, Sakurako's life gently flew up and slowly landed on the wet and cold street, like a butterfly at night. Although it was spring, it seemed to be late autumn. She just crossed the road to help me post the letter. This simple action is something I will never forget. I slowly opened my eyes and stood under the arcade in a daze. My eyes were filled with boiling tears. All the cars in the world stopped, and the crowd surged into the middle of the road. No one knew that the one lying on the street was my butterfly. At this time, she was only five meters away from me, so far away. Bigger raindrops splashed on my glasses and splashed into my life. Why? Only an umbrella? However, I saw Sakurako wearing a white windbreaker and holding an umbrella as she quietly crossed the road. She was going to help me send a letter. It was a letter to my mother in the south. I stood under the arcade blankly, and I saw the eternal Sakurako walking to the center of the street. In fact, the rain was not heavy, but it was the heaviest rain in his life. And the letter was written like this. Did the young Sakurako know? Mom: I plan to marry Sakurako next month. Question 1: Who is the protagonist of the novel? How did the author describe the protagonist? 2. Why did the article repeatedly mention the word "butterfly" and use "forever butterfly" as the title? She was just crossing the road to help me post the letter. This simple action is something I will never forget. (2) Although it was spring, it seemed to be late autumn. Hurry up, it has to be at 3 p. m. tomorrow.