Theory/Gameplay

Theory
Driver	any
Gender	Female
Type	Humanoid
Weapon	Chroma Katana

This article is about Theory's gameplay in this specific game. For information on the character in general, see Theory.

Theory is a Rare Blade in Xenoblade Chronicles 2.

Stats

General stats

Element	Ice
Weapon class	Chroma Katana
Default weapon	Nameless Katana
Cooldown time	15.00s
Aux Core Slots	2
Merc Group name	Purificators
Base strength	0

Stat modifiers

Physical defense	+20%
Ether defense	+30%
Maximum HP	+0%
Strength	+0%
Ether	+0%
Dexterity	+0%
Agility	+15%

Affinity modifiers

Base affinity	400
Affinity gain	-10%
Affinity loss	-20%

Favorite items

Categories	Veggies
	Board Games
Items	Steamed Veg Stralu
	Sparkly Snow Perfume

Base rarity

Condition	Blade has been released
Group 1	1%
Group 2	1%
Group 3	1%
Group 4	1%
Group 5	1%
Pity Blade	—

Skills

Specials

Level	Name	Description
	Ice Slash	After throwing ice knives, attack with slashes.
	Frost Banish	Release a powerful somersault kick after three repeat attacks.
	Rebel Sister	With one slash, smash an ice pillar and attack enemies over a wide area.
	Winter's Wake	Hurl out continuous ice strikes to freeze the enemy in their tracks.

Blade Arts

Name	Probability	Recharge	Description
Accuracy Up	75%	15s	Increases accuracy.
Nullify Reaction	75%	37.5s	Nullifies one reaction.

Battle Skills

Name	Effect
Aerial Flashdance	Counters attacks with 200-400% physical damage.
Conviction	Increases damage dealt to enemies targeting user by 25-50%.
Steadfast	Boosts Break resistance by 30-70%.

Field Skills

Name	Description
Ice Mastery	The power of an Ice Blade.
Focus	The power to focus on one thing. Also used to control one's power.
Nopon Wisdom	Knowledge related to Nopon. Decode writing, speak Nopon, etc.

Affinity Chart

		Level 1	Level 2	Level 3	Level 4	Level 5
Key affinity condition		(unlocked)	Increase Trust. (x100)	View Heart-to-Heart "Rough Diamond", then go to Uraya's Commercial District and end the quest "Theory and Praxis". Revealed After the party winds up in Uraya After having access to Nia, Tora, Mòrag, Zeke, and Praxis	At Lyta Oasis, Gormott, view the Heart-to-Heart "Sisterly Love". Revealed After completing Theory and Praxis. After chapter 2 begins	Increase Trust. (x9,800)
Reward text			I think we'll get on well...	Big sis looked really happy...	The three of us will make many more memories together!	Maybe friendship isn't so bad...
Reward			Truth x200	Truth x300	Truth x500	Truth x800
Ice Slash	Effect	Increases aggro drawn from Specials by 60%.	Increases aggro drawn from Specials by 70%.	Increases aggro drawn from Specials by 80%.	Increases aggro drawn from Specials by 90%.	Increases aggro drawn from Specials by 100%.
	Condition	(unlocked)	Perform a Blade Combo. (x5)	Use Ice Slash. (x11)	Defeat an Indoline Star at the World Tree. (x4) Revealed after the party enters the World Tree	Use Ice Slash. (x13)
	Reward text		Allow me to freeze you solid.	This was the right decision...I'm sure. The power will be mine to command.	I will grow strong. There will be no more failure.	Stand still. This will be wonderful.
	Reward		Truth x200	Truth x300	Truth x500	Truth x800
Frost Banish	Effect	Increases damage dealt to enemies targeting user by 60%.	Increases damage dealt to enemies targeting user by 70%.	Increases damage dealt to enemies targeting user by 80%.	Increases damage dealt to enemies targeting user by 90%.	Increases damage dealt to enemies targeting user by 100%.
	Condition	(unlocked)	Defeat a Gamen Grebel at Spirit Crucible Elpys. (x5) Revealed after the party enters Spirit Crucible Elpys.	Perform a Driver Combo. (It's enough to just be present.) (x7)	Use Frost Banish. (x9)	Defeat Impassable Edgar in Tantal. (x1) Revealed after the party reaches Tantal
	Reward text		I hate Gamen Grebel... No more, please...	I will not fail.	You need efficiency to weaken the enemy...	Impassable Edgar... It was the perfect opponent to do battle with.
	Reward		Truth x200	Truth x300	Truth x500	Truth x800
Rebel Sister	Effect	Increases critical damage by 25%.	Increases critical damage by 40%.	Increases critical damage by 55%.	Increases critical damage by 70%.	Increases critical damage by 85%.
	Condition	(unlocked)	Use Rebel Sister. (x5)	Walk a lot. (x10,000)	Perform a Driver Combo. (It's enough to just be present.) (x10)	Perform a Blade Combo finisher. (x3)
	Reward text		I'm improving, I think...	You know...I quite enjoyed the journey.	I've found a way to freeze an enemy to its very core. May I?	Welcome to the world of ice. It's colder than you can imagine...
	Reward		Truth x200	Truth x300	Truth x500	Truth x800
		Level 1	Level 2	Level 3	Level 4	Level 5
Aerial Flashdance	Effect	Counters attacks with 200% physical damage.	Counters attacks with 250% physical damage.	Counters attacks with 300% physical damage.	Counters attacks with 350% physical damage.	Counters attacks with 400% physical damage.
	Condition	(unlocked)	Evade an attack. (x5)	Evade an attack. (x7)	Evade an attack. (x9)	Evade an attack. (x10)
	Reward text		It's all right. Stay calm and observe the enemy closely.	I think I've gotten better at dodging. Let me help you.	Dodge and then strike. There's only a small window of opportunity.	Are you aiming for a counter?
	Reward		Truth x200	Truth x300	Truth x500	Truth x800
Conviction	Effect	Increases damage dealt to enemies targeting user by 25%.	Increases damage dealt to enemies targeting user by 30%.	Increases damage dealt to enemies targeting user by 35%.	Increases damage dealt to enemies targeting user by 40%.	Increases damage dealt to enemies targeting user by 50%.
	Condition	Deal a certain amount of total damage. (x200)	Deal a certain amount of total damage. (x8,000)	Deal a certain amount of total damage. (x16,000)	Deal a certain amount of total damage. (x32,000)	Deal a certain amount of total damage. (x48,000)
	Reward text	I've become stronger.	This is only the beginning. Here's where we get serious.	It's not over yet. Don't get careless.	Let's keep this up.	You've helped me come so far... Thank you.
	Reward	Compassion x100	Compassion x200	Compassion x300	Compassion x500	Compassion x800
Steadfast	Effect	Boosts Break resistance by 30%.	Boosts Break resistance by 40%.	Boosts Break resistance by 50%.	Boosts Break resistance by 60%.	Boosts Break resistance by 70%.
	Condition	Use Theory's favorite pouch items. (Board Games category) (x2)	Block an attack. (x5)	Block an attack. (x7)	Block an attack. (x9)	Block an attack. (x10)
	Reward text	Do you enjoy playing board games? I find them...OK, I guess.	I will support you to the best of my ability. Are you concerned?	I won't forgive anyone who tries to hurt you.	I have your back. I swear, I will protect you.	Don't worry. I won't let you come to any harm.
	Reward	Truth x100	Compassion x200	Compassion x300	Compassion x500	Compassion x800
		Level 1	Level 2	Level 3	Level 4	Level 5
Ice Mastery	Effect	The power of an Ice Blade.
	Condition	(unlocked)	Defeat a Dusky Riik at Spirit Crucible Elpys. (x5) Revealed after the party enters Spirit Crucible Elpys.		Defeat a Kustal Sovereign at the World Tree. (x5) Revealed after the party enters the World Tree
	Reward text		I've become quite proficient with ice now.		Tell me if you need any ice. I'll turn them into sculptures.
	Reward		Truth x300		Truth x800
Focus	Effect	The power to focus on one thing. Also used to control one's power.
	Condition	(unlocked)	Use Theory's favorite pouch items. (Vegetables category) (x4)		Use Theory's favorite pouch item from the Vegetables category. (x4)
	Reward text		Vegetables really aren't bad.		Steamed Veg Stralu really...warms you up from the inside.
	Reward		Justice x300		Justice x800
Nopon Wisdom	Effect	Knowledge related to Nopon. Decode writing, speak Nopon, etc.
	Condition	(unlocked)	Speak to a Nopon. (x30)		Use Theory's favorite pouch items. (Board Games category) (x2)
	Reward text		How is it that Nopon are irritating, yet lovable creatures?		Ah...I could get used to this. This is fun...
	Reward		Truth x300		Truth x800

Dialogue

Main article: Theory/Gameplay (XC2)/Dialogue

Gallery

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  Theory's Affinity Chart