I don't have enough information to say exactly who Tara Reade is in these stories. She could be an ordinary person with an interesting story, or she might be a public figure in a specific community.
One common theme is the struggle between good and evil. Since Tara is often portrayed as a good character in the Buffyverse and vampires are typically associated with evil, the fanfictions often explore how Tara deals with the vampire elements, whether it's fighting them or trying to understand them.
Yes, it could be a true story depending on the context. There might be an individual named Beverly Sutphin in real life around whom a story has been based. However, without more specific information, it's hard to be certain.
One popular Buffy Tara vampire Tara fanfiction is 'The Magic Between Them'. It delves deep into the relationship between Tara and the vampire elements in the Buffy universe. It has great character development and some really interesting plot twists.
I'm not sure specifically as there could be many different takes on it. It might be a fan - made story about a character named Beverly in a setting called Everly within the context of an IT - related universe. Maybe it involves Beverly's adventures, relationships, or challenges in this particular Everly within the IT - fanfic world.