Tamppari was a female Starfleet officer in the 24th century. As of the year 2371, she held the rank of captain, and was commanding officer of the USS O'Keefe. That year, she and her ship were assigned to the Mars Defense Perimeter, and given this sensitive posting, was one of the first vessels where crew blood screenings were mandated to look for Changeling infiltrators. (CoE eBook: Remembrance of Things Past, Book I)