Guard Stance

Guard Stance is a new game mechanic in Fire Emblem if

Overview
Guard Stance works similar to Dual Guard in Fire Emblem: Awakening. If two units are combined into one singular unit like the Pair Up function in Awakening, the main unit gains stat boosts. In battle, the supporting unit will fill a Guard gauge and will block an incoming attack if it is full. It will also always block any attack from an Attack Stance supporting unit.