Is the heroine of my novel Mary Sue?

It's a novel I wrote at the last minute. The plot is too melodramatic, but I want to confirm if my female lead is Mary Sue. Name: Alice. claisen [Age: 16] [Appearance: Coffee colored hair, green eyes on the left and red eyes on the right, non-human, true appearance of a demon (When using the ability, the hair will turn white and the eyes will turn red)] [Character: Extremely gentle, kind-hearted, but actually a little eccentric.] [Family background: I know this is the easiest for Mary Sue. All her relatives are dead, and she is cursed to not live past 17 years old. However, her parents are both handsome and beautiful. Her family is very old and powerful.] [Ability: Tailor expert. Able to learn anything very quickly, but can't swim (afraid of water). Slightly afraid of heights.] [Plot: He is popular, but he will never have an ambiguous relationship with anyone (except for the male protagonist). The male protagonist is a cold handsome man, an ordinary human. His profession is to hunt creatures like the female protagonist. The female protagonist is not very strong. She was saved by the male protagonist from the brink of death several times. The male protagonist can smell the scent of these creatures, but the female protagonist is no different from an ordinary human when she does not use her ability. Therefore, the male protagonist did not discover the true face of the female protagonist at first.] The female protagonist's goal was to kill the person who destroyed her family before the age of 17. Until the end, no one was tempted (she had always had an ambiguous relationship with the male protagonist). The male protagonist knew the true face and purpose of the female protagonist but did not understand the female protagonist. He loved and hated her. The female protagonist saved the male protagonist, but the male protagonist killed the female protagonist because the female protagonist was not human and was deceived by the female protagonist's enemy. In the end, the male protagonist came to his senses and killed the female protagonist's enemy. He regretted it and committed suicide in the end... I know that the plot is extremely shocking, but I want to know if this female lead is the evil Mary Sue who was scolded by many people? Everyone can do whatever they want. I thought the plot was really bad.