Narkissos
The enchanting echo fairy Ekho falls in love with Narkissos who is a majestic hunter. Unfortunately, Narkissos is never ever interested in Ekho and this unrequited love leads to the death of this beautiful fairy.
The Gods living on the Mount Olympos gets very much annoyed about this case. They decide to punish Narkissos due to his unconcerned attitude. One day, while Narkissos was coming back from an exhausting hunt, he goes by the lake to quench. He can’t stop getting fascinated when he glimpses his image on the lake and he falls in love with himself. He admires himself during his natural life. After his death, his body turns into narcissus… 
From that day on, the people who love themselves a lot are called “narcisist”…