Mary Sue is NOT a lesser deity under Mystra.
Mary Sue is Mary Sue.
Mary Sue is a speshul snowflake and is perttyful and stuffs.
Followers of Mary Sue are usually Mary Sues and Gary Stus.
Mary Sues refuse to follow Mary Sue because she is a Mary Sue and they want to be the most speshulist prettyfulist Mary Sue.
There are no benefits to following Mary Sue
Clergy and Temples
Mary Sue has no temples.
Relationships with other Dieties
Mary Sue is hated by all other Deities.
Mary Sue's history is mysterious and every changing. She is just that much of a spehsulist prettyful bootiful snewflaek.
Not Coming soon.
Khary is Mary Sue's Gary Stu.