Aire's Doppelganger mostly uses status ailment spells against the player and can use healing spells to support the enemy party. The player should try to defeat Aire's Doppelganger quickly, since it can use Cura and Curaga to heal the entire party. The Doppelganger’s physical attacks do not inflict much damage, but they may inflict the Suppress and Curseailments. When it is encountered in the Witch's Mansion as a boss, the Doppelganger receives higher stats and can attack twice per turn.
When fighting the enemy, it is highly advised of the player to equip a Darksteel Shield to all party members. To defeat the Doppelganger quickly, the player should attack light-elemental weapons and spells.