Twin Fangs

Some rogues like to keep things close and personal. They sharpen theirs skills like a fine blade, learning how to compensate for the short range of daggers with skill and wits. It also allows for usage that could not be done with more "proper" combat weapons.

Short Blade Specialist

Starting at 3rd level, you know how to use daggers better in combat, while not as powerful as swords, axes or other one handed weapons, you know well how to use em to make the most of openings in your enemy's defenses.

While dual wielding daggers, you gain the following benefits: 

• You can draw daggers from your inventory as part of your attack action. Additionally, you can draw or stow two daggers when you would normally b e able to draw or stow only one.  
• When throwing daggers, you can throw at long range without disadvantage.
• Your sneak attack damage dice is a d8 instead of a d6.

Additionally, you can use 2 daggers as if they where thieves' tools, and have advantage on checks to keep up to 2 daggers hidden on your clothes.

Inverted Grip Technique

Starting at 9th level, you learn how to use daggers to better hold unto things, or creatures.

While dual wielding daggers, you gain the following benefits: 

• You can make grappling actions as a bonus action, without the need of a free hand, and can use Dexterity (acrobatics) checks instead of Strength (athletics) check when making a grappling action or contesting a escape from grapple action. While grappling this way, you can only attack with one of your hands, and you gain advantage when attacking a target you have grappled.
• You gain Advantage on Dexterity (acrobatics) checks made to climb onto bigger creatures and to keep yourself from being knocked off when climbing.
• You have climbing speed equal to your normal movement speed.

Uncanny Parry

At 13th level, your reflexes combined with your technique with light blades allows you to do impressive feats.

You can try to interrupt non spell attacks, you can use your reaction to throw a dagger to intercept or interrupt said attack. (or make a melee attack in case the attacker is adjacent to you). You make an attack roll contesting the enemy's attack roll, if your attack roll is higher the enemy's attack misses. 

Additionally, whenever a creature misses a attack made against you,  and is within 30ft, you can use your reaction to make an melee or thrown attack with a dagger against the attacker.

Dagger Master

Starting at 17th level, you become a master at using daggers in combat.

While dual wielding daggers, you gain the following benefits: 

• You gain + 1 AC.
• You have advantage on initiative rolls.
• You can attack with both hands even when grappling.
• You can make 2 reactions instead of one every turn.