Agile Duelist

You have trained extensively with a fencing master to learn the noble art of defending your honor, giving you the following benefits:

• Increase your Dexterity score by 1, to a maximum of 20.
• You gain proficiency with the rapier. 
• You gain the ability to hold a dagger in your off-hand, as a main gauche for defensive purposes only; doing so adds +1 to your AC. You may not attack with this weapon.
• You may still select and benefit from the Dueling fighting style, despite having the main gauche dagger in your off-hand.