I don't have enough information to determine exactly who Judith Kay is. She could be an ordinary woman who gets caught up in an extraordinary situation involving the mirror.
Kay might be the person who created this unique fan fiction world. In the context of the story, Kay could also be a protagonist or an important side - character. Maybe Kay is an archaeologist who discovers the mummy and experiences the unexpected comfort. Or Kay could be a local guide in an area with mummy - related legends, and through some adventure, the comfort aspect comes into play. Without reading the fan fiction, it's hard to be certain.
Chris Chan in the 'chris chan story' is an individual known for his eccentric behavior. He has made a name for himself in some online spaces due to his rather unusual actions and content.
The Kay Scarpetta novels are typically published in a certain chronological order. For example, 'Postmortem' is one of the early ones in the series. But to get the full and accurate order, it's best to check the official Patricia Cornwell website or a reliable bookseller's website.
I'm not entirely sure which is the absolute latest Kay Scarpetta novel at the moment. But Patricia Cornwell, the author, has been writing these novels for a long time. You can check her official website or major book retailers to find out the most recent one. Usually, the new novels in this series keep up with the modern forensic techniques and also deal with the personal and professional challenges that Kay Scarpetta faces in her life.