Au999.9 was pure gold, and the gold content was no less than 999.9%. It was the highest value in the naming of jewelry. It was dark yellow in color and extremely pure. It shone with golden light and was bright. The markings were usually printed with words such as "Thousand Gold,""999 Gold," or "G999."
An AU fanfic is a type of fan fiction where the story takes place in an alternate universe with different settings or circumstances than the original work.
An au fanfic is a type of fan-written story that takes the characters or setting of an existing work and places them in an alternate universe or situation that differs from the original.
I'm not sure exactly who Michelle Brown is without reading the story in detail. But she is likely the victim of identity theft in this particular account.
I'm pretty sure there isn't a Michelle in the Spiderman comics. The comic characters are pretty well-defined, and Michelle isn't one of them. But you never know, there could be a new character introduced in future issues.
Michelle Brown is the victim of identity theft in this story. She is the central figure whose experience with having her identity stolen is being told.
In fanfiction, 'au' is short for 'alternate universe'. It allows fans to explore different 'what - if' scenarios. For instance, in a Supernatural AU, the characters could be normal humans instead of hunters. Writers can change character relationships, like Sam and Dean being estranged instead of the close brothers they are in the original show. It gives a lot of creative freedom to play around with the source material in new and exciting ways.