Eosian is a term used to describe a person who presents themselves in a neutral way, but does not identify as a person of neutral/neutrois gender.
The term is similar to but different from neuproche. With neuproche, gender non-conformity is an integral part of one's queer experience. However, this is not the case with eosian.
The term can be used by anyone whose gender is not inherently neutral. The feminine and masculine counterparts are selian and apollonian, respectively.
The term and flag were created by FANDOM user Humorousgayclown, who also created the apollonian and selian terms offsite.