Pisces

Pisces is a Celestial Spirit that is one of the 12 Golden Zodiac Keys. It's key is currently owned by Yukino Aguria.

Appearance
Pisces is a two-bodied sea creature, that seems to resemble a koi fish. The other body is white while the other one is black. The symbol of Pisces constellation can be seen on each of its faces and circle markings can be seen all over their bodies.

History
Not much is known about Pisces' history, only that at one point it made a contract with Yukino.

X791 arc
During the Grand Magic Games, Pisces was summoned by Yukino during her fight with Kagura Mikazuchi and was easily defeated alongside Libra by the latter.

Magic and Abilities
Immortality: As a Celestial Spirit, Pisces cannot die, unless it is somehow forced to stay in the Human World for a long period of time.

Flight: Pisces can glide through their air and attack their opponents from above. Its attacks are well synced and can be used simultaneously for devastating attacks.