With an advanced party, it is possible for Snow to enter a "perfect defense" state. Equip him with his Winged Saint weapon or save the queen upgrade (for the improved Guard II ability); your three active party members must have reached Role level 5 as Sentinels. Paradigm Shift to Tortoise (SEN + SEN + SEN), and have snow preform Steelguard or Mediguard. Any attack aimed at him during that time will inflict only 1% damage or less.