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Theory is a Rare Blade in . She can grant tremendous power to her Xenoblade Chronicles 2 Drivers, Rex, Nia, Zeke, or Mòrag, and their allies. Theory uses the ice element, wields a Chroma Katana, and acts as a Tank in battle. She moves as a skater on ice with an elegance reminiscent of a fairy, similar to Praxis, a female Blade with whom Theory shares a bond.
Lv. 1 -
Ice Slash - After throwing ice knives, attack with slashes. Lv. 2 -
Frost Banish - Release a powerful somersault kick after three repeat attacks. Lv. 3 -
Rebel Sister - With one slash, smash an ice pillar and attack enemies over a wide area. Lv. 4 - Winter's Wake - Hurl out continuous ice strikes to freeze the enemy in their tracks.
Accuracy Up - Increases accuracy.
Nullify Reaction - Nullifies one reaction.
Aerial Flashdance - Counters attack with physical damage.
Conviction - Increases damage dealt to enemies targeting user.
Steadfast - Boosts Break resistance.
Ice Mastery - Lv. 3
Focus - Lv. 3
Nopon Wisdom - Lv. 3
Pouch item types: Veggies, Board Games
Pouch items: Steamed Veg Stralu (Veggies), Sparkly Snow Perfume (Cosmetics)
As an Enemy
Theory is first met as a quest-exclusive Blade boss during the "
Crystal Clear" quest, where she is refered to as Plunderous Theory. She is fought at level 33 on Obra Street in Torigoth alongside Piratical Praxis. She is fought a second time at level 48 as a quest-exclusive enemy during the " Pest Control 3" quest where she is refered to as Mediator Theory, alongside a group of Cherys Medooz in the Lud Cloudway: Fonsett of the Leftherian Archipelago.