Cruel, psychopathic, matricidal monster. She got what was coming to her.
When morning came, the sanitation workers that came to clear the garbage saw the dead Little Marisa. By then, Little Marisa had become a mix of bean paste and dried dough skin, with no way to tell that she had once been alive.
No one paid any attention to Little Marisa. Indeed, no one would want to pay any attention. Did Little Marisa even exist in this world? There was no way to know. Perhaps the yu-lives of Little Marisa and Mother Reimu were just someone's dream...