A Good Seal for Yukata Micaiah

Give her distant def, she has good res so try to make good use out of it.
or give her +res seal, it will help her surive mage shots and Ploy more enemies with it.

Double DD for hard res tank enough res makes hp bit matter exept for melee and bows

Ploys are her best seals.

Distant def is the tankiest option. Next are atk ploy and res+3 which edge out HP+5 slightly because she's almost certainly getting doubled.

Distant Defense is the most tanky, but you could try a spd ploy seal (if you have it) to help her avoid some doubles.