Fae

Fae is a playable character in Fire Emblem: The Binding Blade. She is a Divine Dragon child from the hidden Manakete village of Arcadia.

True to her appearance, she is childish and naïve. Despite this, she is several centuries old. Because she is a full blooded dragon, she ages very slowly, even more so than Sophia (who is a half-dragon).

(Source: Fire Emblem Wiki)