Ceresian is a non-binary xenogender in the celestial gender system.
Original
The original definition of ceresian is a combination of juparian and mercurian. It is also known as merjuparian. A ceresian person may feel both energies at once or they may be fluid between them, they may feel different amounts of each at different times.
Rework
Under the rework of the celestial gender system ceresian is known as a gender that is both plutoian and lunettian. Someone who is ceresian could feel both genders at the same time, feeling a connection to both soft feminine celestial energy as well as a connection to the void. Or they may be fluid between the two. They may feel different amounts of each gender at different times. Ceresian can also be considered the demigender form of lunettian. Under the rework neptunian means what ceresian used to mean.
History
The term ceresian and the flag were created by Tumblr user Juparian on December 31, 2017[1]. The definition of many of the celestial genders were altered by System-Lgbt in a rework of the system, to make it more consistent[2].
The colors of the new flag are based on the colors of the dwarf planet Ceres.