At Different times in the game if you go back to Lucca's house in 1000 a.d. Taban(her father) will have made items her to wear, and usually they will be stronger that what she has equiped and always will have other positive affects. Here is a list of the items Taban makes:

Taban Vest
Taban Helm
Taban Armor

Note: These items may be neither sold nor equipped by any other party member.