Narcissus

Narcissus (Greek: Νάρκισσος), in Greek mythology was a hunter from the territory of Thespiae in Boeotia who was renowned for his beauty. He was exceptionally proud, in that he disdained those who loved him. Nemesis saw this and attracted Narcissus to a pool where he saw his own reflection in the water and fell in love with it, not realizing it was merely an image. Unable to leave the beauty of his reflection, Narcissus died.

The Mark of Athena
Hazel and Leo meet Narcissus at the Salt Lake when they are looking for Celestial Bronze needed to repair the damaged Argo II.

Trivia

 * Narcissus is the origin of the term narcissism, a fixation with oneself.