Theory (Japanese: セオリ, Seori) is a Rare Blade in 异度神剑 2. She can grant tremendous power to her 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, another 女性BLADE with whom Theory shares a bond.
Theory was designed by CHOCO, who also designed Praxis and T-elos.
Contents
Acquisition
Unlike most 其它 Blades, Theory can only be found after being awakened from the Theory's Core Crystal. It is obtained as a reward after completing the quest Blade-Sharp Memory.
Personality
Theory is quite cold toward 其它, including her Driver, but initially has a very strong bond with Praxis, who she cares for immensely. Upon being returned to her core and reawakened, Theory becomes cold again, treating Praxis distantly until they get to know each 其它 again. She is soft-spoken but determined toward her goals.
Appearance
In contrast to Praxis' rounded, bubbly appearance, Theory is made up for sharp spears of ice and harsher lines. She has a slight build, lank pale blue hair, and one blue eye (her left is covered with a black eyepatch with an ice spear sticking out from it). She wears a black tabbard with a white crop-top, loose black 裤子/长裤 and bronze ornamentation. Her core crystal is V-shaped and identical to Praxis'.
牵绊 and Blade Quest
Theory and Praxis during Crystal 晴天
Praxis takes part in two 牵绊; "Rough Diamond" and "Sisterly Love", the former in Orl Cloudway: Fonsett between Praxis, her Driver and Theory, and the latter between Praxis, Theory and Theory's Driver at Lyta Oasis. "Rough Diamond" explores how Theory has changed and lost her bond with Praxis due to returning to her core, and "Sisterly Love" shows how they've progressed since, with Theory calling Praxis "Sis", which she swore she would never do in their first 牵绊. In both, the two are looking for beautiful landscapes to see.
Crystal 晴天
Crystal 晴天 is activated automatically upon visiting Torigoth after 第5章 after having heard the rumour about Core Crystal 猎人; Theory and Praxis attack the party in a theft attempt. They fail and are driven off, so the party attempt to set an 奇袭作战 for them which winds up being an 奇袭作战 itself. The party fight Theory, her Driver and Praxis but half-way through the battle Praxis' Driver, engaging the ardainian army elsewhere, is killed, reverting Praxis to her Core Crystal. Theory and her Driver escape, with Theory protesting greatly at having to leave Praxis.
Blade-Sharp Memory
Theory during Blade-Sharp Memory
Once Praxis is reawakened and her 牵绊 Chart at level 4, Blade-Sharp Memory is activated automatically upon visiting the Royal 防守 BLADE HOME in Fonsa Myma after 第7章. Theory throws a note attached to a lance that narrowly misses Nia, inviting Praxis to rediscover her memories in Gormott Province. Once there she throws another lance, forcing the party to tell Praxis about Theory and her past as a mercenary. Theory throws a final lance in Nharil Central Plaza in Mor Ardain inviting Praxis to the Lost Capital Judicium where she and her Driver 奇袭作战 the party in an attempt to kill Praxis' Driver to retrieve her. Praxis begs Theory not to fight and insists that she doesn't want to be a mercenary, which makes Theory's Driver instruct her to kill Praxis - Theory refuses to do this and stabs her Driver instead, killing him and returning her to her Core Crystal. Praxis promises her that they will be as close when she reawakens.
Theory and Praxis
Theory during Theory and Praxis
Once both awakened, Theory and Praxis decide to do good deeds to repent for their previous lives of crime. Theory and Praxis can be activated by visiting the 商业区 in Fonsa Myma after 第8章, after "Rough Diamond" has been viewed. They find a pair of children missing their 父亲, fight off mercenaries who are heckling said 父亲, and then gather ingredients to be baked into cookies for the local children.
Abilities
Blade Specials
- Lv. 1 - Ice 斩击 - After throwing ice knives, attack with slashes.
- Lv. 2 - Frost Banish - Release a powerful somersault 踢 after three repeat attacks.
- Lv. 3 - Rebel Sister - With one 斩击, smash an ice pillar and attack 敌人 over a wide area.
- Lv. 4 - Winter's Wake - Hurl out continuous ice 攻击 to freeze the 敌人 in their tracks.
Blade Arts
- Accuracy Up - Increases accuracy.
- Nullify Reaction - Nullifies one reaction.
Battle Skills
- Aerial Flashdance - Counters attacks with 200% to 400% 物理 damage.
- Conviction - Increases damage dealt to 敌人 targeting user by 25% to 50%.
- Steadfast - Boosts Break resistance by 30% to 70%.
Field Skills
- Ice Mastery - Lv. 3
- Focus - Lv. 3
- 诺彭 Wisdom - Lv. 3
Favorite Items
- Pouch item types: Veggies, Board Games
- Pouch items: Steamed Veg Stralu (Veggies), Sparkly Snow Perfume (Cosmetics)
牵绊 Chart
| Type | Name | Skill Level | 牵绊 Level | Effect | Prerequisite | Count | Flavor Text |
|---|---|---|---|---|---|---|---|
| Key 牵绊 Reward | 1 | 1 | 牵绊 Chart level 1 unlocked | ||||
| 2 | 2 | Unlocks level 2 of the 牵绊 Chart | Increase Trust | 50 | "I think we'll get on well..." | ||
| 3 | 3 | Unlocks level 3 of the 牵绊 Chart. 牵绊 bond will be easier to sustain. | View 牵绊 "Rough Diamond" then go to Uraya's 商业区 and end the quest "Theory and Praxis" | N/A | "Big sis looked really 高兴..." | ||
| 4 | 4 | Unlocks level 4 of the 牵绊 Chart | At Lyta Oasis, Gormott, view the 牵绊 "Sisterly Love" | N/A | "The three of us will make many more memories together!" | ||
| 5 | 5 | Unlocks level 5 of the 牵绊 Chart | Increase Trust | 9,800 | "Maybe friendship isn't so bad..." | ||
| Blade Special | Ice Slash | 1 | 1 | Increases aggro drawn from Specials by 60% | |||
| 2 | 2 | Increases aggro drawn from Specials by 70% | Perform a 异刃连击 | 5 | "Allow me to freeze you solid." | ||
| 3 | 3 | Increases aggro drawn from Specials by 80% | Use Ice Slash | 11 | "This was the 准确的判断...I'm sure. The power will be mine to command." | ||
| 4 | 4 | Increases aggro drawn from Specials by 90% | Defeat an Indoline Star at the World Tree | 4 | "I will grow strong. There will be no more failure." | ||
| 5 | 5 | Increases aggro drawn from Specials by 100% | Use Ice Slash | 13 | "Stand still. This will be wonderful." | ||
| Frost Banish | 1 | 1 | Increases damage dealt to 敌人 targeting user by 60% | ||||
| 2 | 2 | Increases damage dealt to 敌人 targeting user by 70% | Defeat a Gamen Grebel at 精灵 Crucible Elpys | 5 | "I hate Gamen Grebel... No more, please..." | ||
| 3 | 3 | Increases damage dealt to 敌人 targeting user by 80% | Perform a Driver Combo (It's enough to just be present) | 7 | "I will not fail." | ||
| 4 | 4 | Increases damage dealt to 敌人 targeting user by 90% | Use Frost Banish | 9 | "You need efficiency to weaken the 敌人..." | ||
| 5 | 5 | Increases damage dealt to 敌人 targeting user by 100% | Defeat Impassable Edgar in Tantal | "Impassable Edgar... It was the perfect opponent to do battle with." | |||
| Rebel Sister | 1 | 1 | Increases critical damage by 25% | ||||
| 2 | 2 | Increases critical damage by 40% | Use Rebel Sister | 5 | "I'm improving, I think..." | ||
| 3 | 3 | Increases critical damage by 55% | Walk a lot | 10,000 | "You know...I quite enjoyed the journey." | ||
| 4 | 4 | Increases critical damage by 70% | Perform a Driver Combo (It's enough to just be present) | 10 | "I've found a way to freeze an 敌人 to its very core. may I?" | ||
| 5 | 5 | Increases critical damage by 85% | Perform a 异刃连击 finisher | 3 | "Welcome to the world of ice. It's colder than you can imagine..." | ||
| Battle Skill | Aerial Flashdance | 1 | 1 | Counters attacks with 200% 物理 damage | |||
| 2 | 2 | Counters attacks with 250% 物理 damage | Evade an attack | 5 | "It's all right. Stay calm and observe the 敌人 closely." | ||
| 3 | 3 | Counters attacks with 300% 物理 damage | Evade an attack | 7 | "I think I've gotten better at dodging. 至少请允许支援 you." | ||
| 4 | 4 | Counters attacks with 350% 物理 damage | Evade an attack | 9 | "Dodge and then 攻击. There's only a small window of opportunity." | ||
| 5 | 5 | Counters attacks with 400% 物理 damage | Evade an attack | 10 | "Are you aiming for a counter?" | ||
| Conviction | 1 | 1 | Increases damage dealt to 敌人 targeting user by 25% | Deal a certain amount of total damage | 4,000 | "I've becoming stronger." | |
| 2 | 2 | Increases damage dealt to 敌人 targeting user by 30% | Deal certain amount of total damage | 8,000 | "This is only the beginning. Here's where we get serious." | ||
| 3 | 3 | Increases damage dealt to 敌人 targeting user by 35% | Deal a certain amount of total damage | 16,000 | "It's not over yet. Don't get careless." | ||
| 4 | 4 | Increases damage dealt to 敌人 targeting user by 40% | Deal a certain amount of total damage | 32,000 | "Let's keep this up." | ||
| 5 | 5 | Increases damage dealt to 敌人 targeting user by 50% | Deal a certain amount of total damage | 48,000 | "You've helped me come so far... Thank you." | ||
| Steadfast | 1 | 1 | Boosts Break resistance by 30% | Use Theory's 最爱 pouch items (Board Games Category) | 2 | "Do you enjoy playing board games? I find them... OK, I guess." | |
| 2 | 2 | Boosts Break resistance by 40% | Block an attack | 5 | "I will support you to the best of my ability. Are you concerned?" | ||
| 3 | 3 | Boosts Break resistance by 50% | Block an attack | 7 | "I 不会原谅 anyone who tries to hurt you." | ||
| 4 | 4 | Boosts Break resistance by 60% | Block an attack | 9 | "I have your back. I swear, I will protect you." | ||
| 5 | 5 | Boosts Break resistance by 70% | Block an attack | 10 | "Don't worry. I won't let you come to any harm." | ||
| Field Skill | Ice Mastery | 1 | 1 | The power of an Ice Blade | |||
| 2 | 2 | Defeat Dusky Riik at 精灵 Crucible Elpys | 5 | "I've become quite proficient with ice now." | |||
| 3 | 3 | Defeat a Kustal Sovereign at the World Tree | 5 | "Tell me if you need any ice. I'll turn them into sculptures." | |||
| Focus | 1 | 1 | The power to focus on one thing. Also used to 魂控 one's power | ||||
| 2 | 3 | Use Theory's 最爱 pouch items (蔬菜 category) | 4 | "Vegetables really aren't bad." | |||
| 3 | 4 | Use Theory's 最爱 pouch item from the 蔬菜 category | 4 | "Steamed Veg Stralu really...warms you up from the inside." | |||
| 诺彭 Wisdom | 1 | 1 | Knowledge related to 诺彭. Decode writing, speak 诺彭, etc. | ||||
| 2 | 2 | Speak to a Nopon | 30 | "How is it that 诺彭 are irritating, yet lovable creatures?" | |||
| 3 | 3 | Use Theory's 最爱 pouch items (Board Games Category) | 2 | "Ah...I could get used to this. This is fun..." | |||
Battles
Theory is first met as a quest-exclusive Blade boss during the quest Crystal 晴天, where she fights as Plunderous Theory. She is fought at the beginning of the quest on Obra Street in Torigoth, Gormott Province at level 33 alongside Piratical Praxis. Later, she is fought at level 48 as a quest-exclusive 敌人 during the quest 害虫驱除 3 as Mediator Theory, spontaneously 使唤 the group of Cherys Medooz in Lud Cloudway: Fonsett of the Leftherian Archipelago. She does not need to be defeated in order to complete the quest.
Drops
| Name | Type | Rarity | Rate |
|---|---|---|---|
| Chrome Scarf | Accessory | 
|
14.0% |
| Magnet Chip | Core Chip | 
|
12.6% |
| Evasion Focus II | Aux Core |
|
9.0% |
| Metal 诺彭 Mask | Accessory |
|
6.0% |
| Metal 诺彭 Mask | Accessory | 
|
4.0% |
| 袭击 Stone | Accessory |
|
7.2% |
| 袭击 Stone | Accessory |
|
4.8% |
| Common Core Crystal | Core Crystal |
|
5.0% |
| Name | Type | Rarity | Rate |
|---|---|---|---|
| Fire Def Up IV | Aux Core |
|
8.4% |
| Scythe Attachment | Accessory |
|
12.0% |
| Opal Chip | Core Chip |
|
10.8% |
| Recovery Symbol | Accessory |
|
9.0% |
| Recovery Symbol | Accessory |
|
6.0% |
| Common Core Crystal | Core Crystal |
|
7.5% |
Trivia
- Theory and Praxis are the only Blades to have more than one Blade Quest excluding DLC content.
Quotes
Post-Battle Dialogue
第3章 spoilers:
 Theory
|
"Your fighting style is very free-form, isn't it Mythra?" |
 Mythra
|
"Excuse you. I fight only after careful calculation." |
| Theory
|
"I noted eighteen tactical errors in the course of that battle." |
 Nia
|
"Calm your Core Crystal, Theory! It's 厉害的人 you counted, though." |
第4章 spoilers:
| Condition: Blade Quest Theory and Praxis active or complete. | |
 Poppi QT
|
"Meh! Meh! Poppi must discover secret of Theory's strength." |
| Theory
|
"That is... um... I'll ask 我的妹妹." |
第6章 spoilers:
 Aegaeon
|
"That's some deft s「弄清真相」, Theory!" |
| Theory
|
"I am faster, but you are stronger. Your praise is unjustified." |
 Agate
|
"Theory, you're on top form just now! We're all glad to have ya here." |
| Theory
|
"By no means, I have much to learn still. But thank you, Agate." |
 Boreas
|
"My tummy's so empty after fighting. Theory, have you got any chow?" |
| Theory
|
"I do. But in return, can I touch your stomach? It looks so soft!" |
| Theory
|
"Finch, join me at morning practice? I can help you improve." |
 Finch
|
"感谢, Cheery! It's a tempting offer, I've gotta say." |
| Theory
|
"I am - Theory." |
 神frey
|
"Hey Theory! Next time let's go in hot!" |
| Theory
|
"I think I'd much rather look as cool as possible." |
| Theory
|
"Kasandra, your mask is... 和名字相反很可爱!" |
 Kasandra
|
"That's right! It's real charming, 感谢 for noticing. You sure have good eyes." |
| Condition: Blade Quest Theory and Praxis active or complete. | |
 Kora
|
"Well done, Theory! Your fighting is even sharper than your sister's." |
| Theory
|
"I'll try to fight more cutely next time." |
| Condition: Blade Quest Theory and Praxis active or complete. | |
 Newt
|
"Having been appointed by you sister to be your tutor, I, Newt, will now batter you into shape." |
| Theory
|
"That won't be... necessary, I think." |
| Condition: Blade Quest Theory and Praxis active or complete. | |
 Praxis
|
"Theory, are you okay? Any injuries?" |
| Theory
|
"I'm fine, and you sis?" |
| Praxis
|
"Oh, I'm right as 雨天!" |
| Condition: Blade Quest Theory and Praxis active or complete. | |
| Theory
|
"Sis! You don't seem to be hurt, but..." |
| Praxis
|
"Never mind me, are you okay? Though you are tougher than me." |
| Theory
|
"Pay more attention to the battle, Sheba." |
 Sheba
|
"Were you not so beauteous, Theory, we might be less distracted." |
| Theory
|
"Vess, I think you should take fighting a little more seriously." |
 Vess
|
"Oh, r-right, 很抱歉. I was just trying not to hurt anyone." |
| Theory
|
"You fight so... messily, Zenobia!" |
 Zenobia
|
"What! That is so not true. I'm just making sure they can't dodge." |
Gallery
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| Characters in 异度神剑 2 | |
|---|---|
| Playable Characters | Rex · Nia · 虎 · 凡达姆 · Zeke · Mòrag |
| Special Blades | Pyra · Mythra · Dromarch · Poppi α, QT, QTπ · Roc · Pandoria · Brighid · Aegaeon |
| Supporting Characters | Amalthus · Azurda · Bana · Cole · Fan la Norne · Niall · Niranira |
| Torna | Jin · Malos · Sever · Akhos · Obrona · Mikhail · Cressidus · Patroka · Perdido |
|
dagas · Newt · Crossette |
|
Gorg · Praxis · Sheba |
|
神frey · Theory · Ursula · Perun · Dahlia |
|
Adenine · Boreas · Finch · Zenobia · Fiora |
|
Wulfric · Agate · Floren · Nim |
|
Electra · Kora · Herald · Vess |
|
KOS-MOS · Poppibuster · Corvin · Shulk |
|
Azami · Vale · Perceval · Kasandra · T-elos · 艾尔玛 |
