Eva Mech

Eva is a robot (in The Roller Coaster Jet, Silver Bullet, Boomerang, and Kingda Ka) who starts attacking Andy. She slowly turns into Naomi shortly after. She appears in several other Sue Adventure books and she is one person.

She is also known as Eva Mech.

Books Eva are in

 * The Roller Coaster Jet, Silver Bullet, Boomerang, and Kingda Ka
 * So Many Questions
 * Earthquakes!
 * For the Love of Natalie?