Null flag
Alt Null flag
Null or Null Gender is a gender related to or has characteristics of gender nullity. A null gender has no relation with femininity, masculinity, or other gender constructs. Gender nullity is a feeling of emptiness, hollowness, vacuum, nothingness, or blankness of elements, it is a vacant, or scarce gender, but is not necessarily gendervoid or genderless.
While neutral is the balance of both positive and negative energies, null is the result of those energies nullifying each other.
History, Coining & Flag[]
The coiner of the flags and the term does not seem to be known.