Gender fluidity refers to change over time in a person's gender expression or gender identity, or both. That change might be in expression, but not identity, or in identity, but not expression. Or both expression and identity might change together.
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Pink: Represents femininity or feeling female.White: Representing the lack of gender.Purple: Represents a combination of masculinity and femininity, including various degrees of androgyny.Black: Represents all other genders, third genders, and pangender.Blue: Represents masculinity or feeling male.
Also btw my current profile picture is of a genderfluid character named Alex Fierro. She's a biological male, but usually prefers the pronouns she/her, so she's almost trans. She's from a book series called Magnus Chase. If you haven't already read it, I highly recommend it. It's by Rick Riordan (same person who wrote Percy Jackson). so if you like Percy Jackson you'll probably like Magnus Chase. Just saying.