Arigender

 Not to be confused with Aresgender. Arigender, also known as Ariesgender is a zodiacgender based on the constellation Aries. It is described as an unfathomable gender that does not fit under any labels. It is a complicated gender identity that cannot be explained or is very hard to explain.

Flag
The colors are there to represent the Greek god of war, Aries, which is generally associated with warm colors and shades of red.

Resources

 * 1) https://www.deviantart.com/pride-flags/art/Arigender-1-556785045