Ever since Mayumi's constant visits, Harry's life had became considerably better. For example, since Mayumi always comes with sweets and various treats, Dudley was instantly bribed. And since she had somehow charmed their neighbors, Aunt Petunia and Uncle Vernon had to tolerate her existence.
"As somehow, the letters aren't arriving normally," Mayumi blinked meaningfully, "I have taken to act as owl substitute. Also, Ron says hi."