Gwendolyn is a playable character in Fire Emblem: The Binding Blade. She is a knight of Ostia and is the younger sister of Bors. She first appears on turn 5 of Chapter 8 of The Binding Blade, along with Ogier and Barthe, in the northwest corner of the castle. The group assists the Lycia Alliance Army in retaking Castle Ostia. She then joins Roy's group for the rest of his journey. It is notable she can perform a Triangle Attack with Bors and Barthe.