Sorry about the delayed reply, uhm ... well I guess you can see that after shadow left activity has been dwin- I mean it went on a sharp decline who am I kidding.
Now onto your question, yes this was discussed a while back, we got to our specific conclusions, namely the criteria that define a female character as is.
The "girl" part of the definition is understood as a female character, besides the obvious considerations, this term excludes all cases in which:
#1 -The character was not originally created or determined to be female/gynomorphic when it came into existence, including genderless entities, biological/chromosomal sex change, transformations. Only instances of past lives are exempt from this rule.
#2 -The character can shapeshift and is not female/gynomorphic in its standard form, if said character has no standard form, it is defined as genderless; refer to 1. (note this does not include crossdressing)
#3 -The character used to be a female, but is now irreversibly transformed into a male (perma genderbending).
#4 -The character has no shape, physical form or definite femenine/gynomorphic features, minimum requirement is voice.
NOW:::
1. Has to be a female/gynomorphic being since the beginning (of its existence).
2. There is no evidence in the canon works that can disprove or change her status as a female.
3. Does not lose her gynomorphic features (I guess certain types of transformations would be allowed, as long as they don't affect the character, we won't remove Karuta for turning into a giant skeleton for example).
I like this one because it bars most of the TYPE MOON weird iterations of male characters portrayed as female just because CGDCT sells.
This discussion was brought up by me actually, because of the infamous case of this "girl" from Un-Go Sasa Kazamori.
That one time we just removed this character based on the argument that this entity was possessing a gynomorphic body rather than being one to begin with, I'd say the mainly important part of the definition of a "Girl" would be to be conceived as one, although one has to understand the implications of said problem in real life settings ... things like Swyer .. or the possibility of it existing in anime, I'm guessing in that case chromosomal sex would supersede for being the most fundamental and quintessential definition of gender, but I mean, applying that logic in anime seems like a bit overkill .. if not entirely complicated and .. like what the hell am I supposed to do? run a karyotype scan on an anime character?
So you get the idea, primary traits are key, so someone like Bridget would be barred from being granted any status, but someone like that weird strand of hair that apparently belonged to a woman ... I guess that would count as a female still.