Narcissus is one kind of flowers whose name comes from a character holding the same name in Greek mythology. Narcissism also called Narcissistic Personality Disorder (NPD) in phycology just comes from the story of this character.
Narcissus, in Greek mythology, the son of the river god Cephissus and the nymph Liriope. He was distinguished for his beauty. When he was born, Narcissus’s mother was told by the blind seer Tiresias that he would have a long life, provided he never recognized himself.
One day, Narcissus went to quench his thirty at a spring. At that time, when he saw his reflection on the surface of water, he fell in love with himself at one glance. Then he couldn’t get away from the beautiful face in the water ever and pined away. The flower that bears his name sprang up where he died.
Narcissistic Personality Disorder is one type of personality disorder that can't love the original appearance of oneself as it is, and strongly think oneself must be outstanding, wonderful and special. Due to this type of disability, some people even have illusions, depersonalization and suicidal ideation.
In this animation, the girl is suffering from “Narcissistic Personality Disorder”. And like the story in above myth, there is another her: the most beautiful illusion of herself in the world on the surface of water. She tries to embrace the reflection in the water to integrate herself with it. Most of the people would think it a pitiful and foolish thing, a tragedy. But she didn't think so, she just think she is pursuing something permanence and beauty in the world.