Fierce Rival

Fierce Rival is a skill introduced in Fire Emblem Fates; It is the personal skill of Selena.

Fire Emblem Fates
When Selena acts as the supporting unit in an Attack Stance, should the leading unit activate a Critical Hit and lands the blow, Selena's follow up attack will also be a Critical Hit. Fierce Rival does not activate if Selena is wielding a weapon that cannot activate criticals, such as bronze weapons.