Deflector

Deflector is a feat (requires Prerequisite: Dexterity 13 or higher).

Summon a character using this feat

Describe it your way — Deflector is already filled in.

Your lightning reflexes make you hard to hit.
You may expend your reaction to increase your AC by an amount equal to your proficiency bonus against an attack targeting you in melee.
This feat can only be used while holding a finesse weapon that you're proficient with.