Effie is a Knight who was born in the slums of Nohr. One day the youngest princess of the Nohrian royal family, Elise, came to where she lived in disguise and the two quickly became best friends. Eventually, the two got in trouble with some Nohrian guards and were nearly punished until Elise revealed herself. Knowing that she would not meet Elise again under normal circumstances, Effie decided to join the Nohrian army and eventually entered the royal court. Upon being seen in full uniform by Elise, Effie was immediately named as Elise's retainer per her request.