Tsundegender is a gender that feels like a tsundere- cold and unpredictable at first, but once the gender is understood it becomes warm and cozy.
History
Tsundegender was coined by FANDOM user Bunnyisgreat, specifically Fox, as a way to better explain her gender.
Etymology
“Tsundere” comes from a personality type in some Japanese anime. The character starts off as seemingly selfish and cold, but once someone gets to know them, they realize the character is actually quite kind.