Suzy Relane, a refugee from Lagraine, joins the League Militaire alongside fellow refugees Odelo Henrik and Warren Trace. At approximately nine years old, she ranks among the organization's youngest members. The distinct sound of Zanscare Empire mobile suit beam rotors triggers intense panic in her, a reaction rooted in traumatic conflict experiences.

Within the League Militaire, she fulfills non-combat support duties despite her youth. Her key responsibility involves aiding Shahkti Kareen in caring for Karlmann Dukartuse, focusing on nurturing and safeguarding vulnerable individuals during military operations. Suzy's presence reflects the resistance group's diverse composition, which includes non-combatants and children affected by ongoing warfare.