Lv. 80 Neck Implement
For a Secret Lock
Retainer's Code set
A copy arrives at its level rather than being upgraded into it, so this walks the five levels a piece drops at.
DEF 165 
HP 882 
CRIT Rate 7.5% 
CRIT DMG 12.5% 
ATK % 10% Retainer's Code Set
Retainer's Code
Set effect at 4 pieces
HP % +12% Increases the holder's HP by 12%. When the character's Ultimate Charge Efficiency exceeds 150%, all other team members gain 6% DMG.
The other 3 pieces that complete the set:
Stats are fixed: a second copy of this piece at the same rarity and level is identical to the one you are wearing. The rollable substats in Silver Palace sit on your Epiphany.
Set Description
The master's newspaper needs ironing, and the mistress's tea needs bringing to the perfect temperature: a maid's work is never done, and even when busy, they must remain elegant and composed. A fine maid always rises to meet the master's standards.