Eiko is one of the many "perky young girl" characters to appear throughout the series. It is a role preceded by both Rydia (as a child) and Porom from "Final Fantasy IV", Krile Baldesion from "Final Fantasy V", Relm Arrowny from "Final Fantasy VI", Yuffie Kisaragi from "Final Fantasy VII", and Selphie Tilmitt from "Final Fantasy VIII", and succeeded by Rikku from "Final Fantasy X", Penelo from "Final Fantasy XII", Oerba Dia Vanille from "Final Fantasy XIII", and Iris Amicitia from "Final Fantasy XV" (though the latter was merely a guest character, she nonetheless came the closest to filling the role).