Synithean

Synithean is a xenogender under the mingender umbrella that's defined as a kingender and/or plural experience marked by a sense of gender that is beyond human comprehension to the point where it cannot be described as genderless or not. It is distinctly nonhuman. It can be adapted to coexist with a human gender presentation, and when doing so it tends to feel and present as vaguely masculine.

History
Synithean was coined by the Astrophel Choir System on March 12th, 2021.

Flag
The purple/green flag was created on April 3rd, 2021 by Tumblr user xenictrender. The purples represent vague masculinity, the pink represents nonhumanity, and the greens represent the aporaine feel of the gender.

The purple/black flag was created on November 6th, 2020 by Astrophel Choir System in a Discord server. The blueish purple represents masculine presentation, the pinkish purple represents eldritch/beyond human comprehension elements, and the black represents possible genderlessness.