Lost Celestial Spirits

Lost Celestial Spirits is a type of Celestial Spirit that was forgotten. Their keys are black in color.

History
Not much is about these strange celestial spirits, but only that they were long forgotten and none of them are never used.

Mako Tachibana
Mako was the first Celestial Spirit Mage to encounter these unknown keys. She currently has two in hand. Mako promised them that she'll deffinately make them get noticed no matter what.