Using a Heaven Seal, Lyn can be promoted to the Blade Lord class, being one of three lords in Eliwood’s army alongside Hector and Eliwood himself. She initially worked with the two to free Caelin from an occupation by the Laus army, saving her grandfather. After ensuring the safety of her family and nation, she travels with Hector and Eliwood, acting as a voice of reason among the three.