Especially if you have any inquiries regarding HC3 and you would like to continue discussing it, then I think it'd be more appropriate to carry on either here or in the actual Hello Charlotte Episode 3 comment section just to keep things on topic.
Before HC3 came out, Etherane herself stated that the pretty, white-haired, white-eyed girl we see in Charlotte is not how she actually looks. In HC2 after her delusions start to fade and when you talk to the students, some of them will call her things like "ugly" and will tell her that she looks like *&%$ ("shit", obviously), even making fun of the way she dresses. "Are you wearing your grandma's shirt?"
Hello Charlotte 3 gives us a taste of what Charlotte supposedly really looked like. But HC3 once again screws with what was previously established by introducing the whole multiple Charlotte units thing that I love so much. this effectively creates a disconnect between the "bullied one" and Charlotte because they are all manufactured to have a similar appearance with the distinct white hair and eyes; there is no room for Charlotte's appearance being a lie here. Therefor, despite what was lampshaded in the last game and what the series creator has gone on record saying, this girl is canonically NOT Charlotte, and remains nameless. Oops.
So, at best, this girl is what ended up heavily inspiring the persecution that the Charlottes end up having to endure in the False Realm after Charles' death. Her appearance in the false realm being based on Vincent's online handle C (Charles used the Charlotte handle to kind of be a female counterpart to C, iirc). If you want a conclusive confirmation, you'll have to fish for answers from Ane.
I actually created an article for this character, which you'll find here. It's still being worked on so it's not complete yet as of the time of this post, but feel free to check it out when you get the chance.