Demiwoman

Definition and Usage
Demigirl (also known as: demifemale, demiwoman) is a gender identity that is partially, but not fully, female or feminine. A demigirl can be both "female" and "nonbinary", or just "loosely female". Although it is a label within itself, it can be used as an umbrella term describing partially-female, partially-not genders. It can be static or fluid.

Subgenders
There are many other genders similar but more specific than demigirl, including gxrl & genderfae.

Flags
The pink in the flag represents the tie to feminine/female gender, while the grey tones reference the other gender feelings.