In Fire Emblem Gaiden and its remake, Echoes Shadows of Valentia, Sonya is a playable character who was 25 years old in the latter game. As a child, she lived with her older sisters Marla and Hestia at a monastery after being abandoned by their father Jedah at a priory when they were young. Despite finding their new home challenging, the three siblings got along well and supported each other. However, at some point in time, Jedah proposed to sacrifice Sonya's sisters as offerings to Duma in exchange for his trust. To avoid this fate, Sonya and her sisters worked together to escape. Later, seeking revenge against their father, Sonya waited for the right opportunity to act.