Bloodtype: AB
Height (in cm): 170
Abilities: singing
Personality: klutz, sleepyhead

One of Neo-Venezia's Three Water Fairies, known by the title "Siren" (天上の謳声, Tenjou no Utagoe, lit. "Heavenly Voice") for her beautiful singing voice. Her blade oar number is 36. She is Alice's mentor at Orange Planet. She often appears quiet most of the time and an airhead who does not pay attention to her surroundings (in the anime, she is shown more than once forgetting to duck while rowing under a bridge), but she genuinely cares about Alice.

Athena has a strange laugh that comes out sounding as though she is angry. She was a trainee undine with Alicia and Akira, and joined them in joint practice.