HP: Miss Slytherin Heir

[Strong female character occ! The original party is afraid to enter! Focus on career! The heroine is not a good person! Not many emotional lines + mainly movie version] In an "accident", Yi Xi traveled into Harry Potter and learned that her surname was Slytherin and that she was an heir in name only. From the moment she entered Hogwarts, she began to make her own plans to prepare for everything that would follow. She had been making plans in private, and she even included herself in her plans. She knew from the beginning to the end that her appearance was destined and she was a victim of unfair treatment. She appeared to live to save others. She could not accept the truth behind the book. She wanted to save the important people, and the prerequisite for the rescue was that she could survive unharmed, because she didn't want to be anyone's victim again. Moreover, she carries the surname of Slytherin after time travel. As a true heir apparent, she has to bear more things than ever before. After the ending, the truth of each incident was unexpectedly revealed. It turned out that everything behind it was traceable. Everyone thought everything was a coincidence, only to realize that someone was silently paying the truth behind it... (The love interaction specifically only appeared after the third grade, and the plot is more female-driven! Don't bother with the love story! If you can't accept it, don't enter!)