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V • T • E

I am not speaking of likes or dislikes... only facts.

~ Tsukatsuki Rio, to Himari

Tsukatsuki Rio (調月リオ) is one of the students studying at Millennium Science School who wields a Handgun.

She is the former president of Seminar, and is the main antagonist of Volume 2.

Quick Answers

What role does Tsukatsuki Rio play in the Millennium Science School? toggle section
Tsukatsuki Rio, a student at Millennium Science School, is recognized for her objective and analytical approach, often prioritizing facts over emotions. She previously held the position of Seminar president and is a significant figure in the school's narrative as the main antagonist in Volume 2.
Provided by: Community
Why is Tsukatsuki Rio referred to as 'Big Sister'? toggle section
Tsukatsuki Rio earns the 'Big Sister' moniker due to her vigilant nature. Though this reflects a protective and nurturing demeanor, characteristics commonly linked with a 'Big Sister' role, she tends to overdo it in the sense that she forces others to follow her because "it's the most rational thing to do."
Provided by: Community
What is the nature of Tsukatsuki Rio's relationship with Himari? toggle section
Tsukatsuki Rio has a complicated relationship with Himari, marked by indirect influences and rivalry. Rio's abrupt leave of absence, and the resulting isolation of her bodyguard Toki, affected Himari. Himari has also criticized Rio's possessiveness and sudden decisions.
Provided by: Fandom
How does Tsukatsuki Rio's personality affect her leadership style as the student council president? toggle section
Tsukatsuki Rio, former president of Seminar and student council president at Millennium Science School, is characterized by a cold, calculating demeanor. Her leadership style is largely influenced by her focus on objective facts, often sidelining emotions. Despite her high-ranking position, her approach to problem-solving is often reckless and deemed irresponsible, leading to criticism. However, her caring nature emerges in her interactions with certain people, demonstrating her readiness to lend a hand when necessary.
Provided by: Community

Profile[]

Introduction[]

Rio is the student council president of Millennium. Cold and calculating, she cares more about objective facts than emotions. She is at odds with Himari due to their contrasting personalities.

Her nickname is "Big Sister."

Personality[]

Rio has always been unsociable and rather scrupulous. She never lets emotions change her mind and always sticks to the facts. Her determination to identify and analyze potential threats to Millennium and Kivotos at large has led her to develop an extensive surveillance system as a result. This in turn has caused her to gain a terrifying reputation among the student body, which she personally ignores. Rio is also very determined when it comes to reaching her goals, even breaking the rules if she has to.

Spoilers!
Following her kidnapping of Aris, Rio has come to deeply regret her actions in Volume 2. Her rival Himari pointed out her possessiveness and abruptness in taking a leave of absence. She brought up the fact that thanks to Rio's actions, her bodyguard Toki grew up with no friends and left with no one to talk to but herself. The harsh words of Himari left Rio emotionally devastated, worsened when Aris was prepared to lay down her own life to break the dimensional barrier protecting the Ark of Atra-Hasis and save Kivotos.

Appearance[]

Rio is tall and voluptuous, with long black hair that reaches her thigh with blunt bangs. She has a fair skin complexion and red eyes with white pupils.

Halo[]

Rio has a metallic halo with two red curved lines opposite of each other within.

Uniform[]

Her uniform consists of a three-buttoned black blazer and a white long-sleeved turtleneck sweater as well as a black knife-pleated mini skirt with a black opaque pantyhose. She also wears black stiletto heels, a holster with two belts tightly attached to her right thigh. On her left chest is a Millennium ID card. Additionally, she uses A Millennium logo hairpin and a square watch.

Firearm[]

She uses a black Springfield Armory M1911 Mil-Spec pistol with gray grips. The Millennium insignia is etched on the forward slide.

Combat[]

Skills[]

V • T • E Big Sister Cost:2
RIO EX-SKILL
  • LV01 ~ Increases ATK by 35.4% (20 sec). Duplicates the ally's EX-Skill Card, matching all attributes but reduces the Cost by 1 (one-time use).
  • LV02 ~ Increases ATK by 38.1% (20 sec). Duplicates the ally's EX-Skill Card, matching all attributes but reduces the Cost by 1 (one-time use).
  • LV03 ~ Increases ATK by 43.4% (20 sec). Duplicates the ally's EX-Skill Card, matching all attributes but reduces the Cost by 1 (one-time use).
  • LV04 ~ Increases ATK by 46.1% (20 sec). Duplicates the ally's EX-Skill Card, matching all attributes but reduces the Cost by 1 (one-time use).
  • LV05 ~ Increases ATK by 51.4% (20 sec). Duplicates the ally's EX-Skill Card, matching all attributes but reduces the Cost by 1 (one-time use).

V • T • E Only One Solution Skill Icons
STAT-DEBUFF
  • LV01 ~ Decreases DEF by 19.6% for 1 enemy and deals 185% of ATK as DMG every 30 sec (19 sec).
  • LV02 ~ Decreases DEF by 19.6% for 1 enemy and deals 195% of ATK as DMG every 30 sec (19 sec).
  • LV03 ~ Decreases DEF by 19.6% for 1 enemy and deals 204% of ATK as DMG every 30 sec (19 sec).
  • LV04 ~ Decreases DEF by 21.5% for 1 enemy and deals 223% of ATK as DMG every 30 sec (19 sec).
  • LV05 ~ Decreases DEF by 21.5% for 1 enemy and deals 232% of ATK as DMG every 30 sec (19 sec).
  • LV06 ~ Decreases DEF by 21.5% for 1 enemy and deals 241% of ATK as DMG every 30 sec (19 sec).
  • LV07 ~ Decreases DEF by 23.5% for 1 enemy and deals 260% of ATK as DMG every 30 sec (19 sec).
  • LV08 ~ Decreases DEF by 23.5% for 1 enemy and deals 269% of ATK as DMG every 30 sec (19 sec).
  • LV09 ~ Decreases DEF by 23.5% for 1 enemy and deals 278% of ATK as DMG every 30 sec (19 sec).
  • LV10 ~ Decreases DEF by 25.5% for 1 enemy and deals 297% of ATK as DMG every 30 sec (19 sec).

V • T • E Star Chaser Skill Icons
WEAPON-BUFF
  • LV01 ~ Increases ATK by 14%.
  • LV02 ~ Increases ATK by 14.7%.
  • LV03 ~ Increases ATK by 15.4%.
  • LV04 ~ Increases ATK by 18.2%.
  • LV05 ~ Increases ATK by 18.9%.
  • LV06 ~ Increases ATK by 19.6%.
  • LV07 ~ Increases ATK by 22.4%.
  • LV08 ~ Increases ATK by 23.1%.
  • LV09 ~ Increases ATK by 23.8%.
  • LV10 ~ Increases ATK by 26.6%.

V • T • E Avant Garde Skill Icons
WEAPON-BUFF
  • LV01 ~ Increases ally ATK by 9.1%.
  • LV02 ~ Increases ally ATK by 9.5%.
  • LV03 ~ Increases ally ATK by 10%.
  • LV04 ~ Increases ally ATK by 11.8%.
  • LV05 ~ Increases ally ATK by 12.3%.
  • LV06 ~ Increases ally ATK by 12.7%.
  • LV07 ~ Increases ally ATK by 14.5%.
  • LV08 ~ Increases ally ATK by 15%.
  • LV09 ~ Increases ally ATK by 15.5%.
  • LV10 ~ Increases ally ATK by 17.3%.


V • T • E Skill Status (Hover Over) Status Effect
EX-Skill Normal Passive Sub UE

Buff - ATK

Buff - ATK Attack Up
Buff
Increase attack damage

Special - Skill Card Duplication

Special - Skill Card Duplication Skill Card Duplication
Special
Duplicate ally's EX-Skill

Debuff - DEF

Debuff - DEF Defence Down
Debuff
Increase the damage received from attacks

Buff - ATK

Buff - ATK Attack Up
Buff
Increase attack damage

Buff - ATK

Buff - ATK Attack Up
Buff
Increase attack damage

Buff - Buff Duration Extension

Buff - Buff Duration Extension Buff Duration Up
Buff
Extend Buff Duration

Growth Material[]

EX-SkillV • T • EGrowth Material
Rio EX
LV02
x12
Millennium EX-Skill Disc 0
x13
Disk Pendant 0
x80K
Gold
LV03
x12
Millennium EX-Skill Disc 1
x18
Millennium EX-Skill Disc 0
x15
Disk Pendant 1
x33
Crystal Haniwa 0
x500K
Gold
LV04
x12
Millennium EX-Skill Disc 2
x18
Millennium EX-Skill Disc 1
x13
Disk Pendant 2
x24
Crystal Haniwa 1
x3M
Gold
LV05
x8
Millennium EX-Skill Disc 3
x18
Millennium EX-Skill Disc 2
x11
Disk Pendant 3
x13
Crystal Haniwa 2
x10M
Gold

Other-Skills (Normal / Passive / Sub)V • T • EGrowth Material
STAT-DEBUFF
LV02
x5
Millennium Skill Book 0
x5000
Gold
LV03
x8
Millennium Skill Book 0
x7500
Gold
LV04
x5
Millennium Skill Book 1
x12
Millennium Skill Book 0
x5
Disk Pendant 0
x60K
Gold
WEAPON-BUFF
LV05
x8
Millennium Skill Book 1
x5
Disk Pendant 1
x14
Crystal Haniwa 0
x90K
Gold
LV06
x5
Millennium Skill Book 2
x12
Millennium Skill Book 1
x7
Disk Pendant 1
x15
Crystal Haniwa 0
x300K
Gold
LV07
x8
Millennium Skill Book 2
x3
Disk Pendant 2
x19
Crystal Haniwa 1
x450K
Gold
WEAPON-BUFF
LV08
x8
Millennium Skill Book 3
x12
Millennium Skill Book 2
x5
Disk Pendant 3
x11
Crystal Haniwa 2
x1.5M
Gold
LV09
x12
Millennium Skill Book 3
x6
Disk Pendant 3
x13
Crystal Haniwa 2
x2.4M
Gold
LV10
x1
Ultimate Skill Book
x4M
Gold

Unique Equipment[]

V • T • E Planner (立案者) Firearm
Rio UE Rio's self-defense pistol.
Although she is not good at shooting, she carries a gun because it is irrational not to have one in Kivotos.

V • T • E Limit Break Firearm
Rio UE Star 2 IconStar 2 Icon Passive skill enhanced to "Star Chaser+"
Star 2 IconStar 2 IconStar 2 Icon Indoor Icon⁠ enhancement to Outstanding Icon
Star 2 IconStar 2 IconStar 2 IconStar 2 Icon Increases Maximum Cost by 0.5
Star 2 IconStar 2 IconStar 2 IconStar 2 IconStar 2 Icon

V • T • E Stats Firearm
Rio UE LV01 LV30 LV40 LV50 LV60 LV70
ATK 97 351 438 526 614 701
HP 712 2587 3234 3881 4528 5175
HEAL

180 655 819 983 1147 1311

V • T • E Star Chaser+ Firearm
Rio UE
  • LV01 ~ Increases BUFF DURATION by 1000. Also increases ATK by 14%.
  • LV02 ~ Increases BUFF DURATION by 1050. Also increases ATK by 14.7%.
  • LV03 ~ Increases BUFF DURATION by 1100. Also increases ATK by 15.4%.
  • LV04 ~ Increases BUFF DURATION by 1300. Also increases ATK by 18.2%.
  • LV05 ~ Increases BUFF DURATION by 1350. Also increases ATK by 18.9%.
  • LV06 ~ Increases BUFF DURATION by 1400. Also increases ATK by 19.6%.
  • LV07 ~ Increases BUFF DURATION by 1600. Also increases ATK by 22.4%.
  • LV08 ~ Increases BUFF DURATION by 1650. Also increases ATK by 23.1%.
  • LV09 ~ Increases BUFF DURATION by 1700. Also increases ATK by 23.8%.
  • LV10 ~ Increases BUFF DURATION by 1900. Also increases ATK by 26.6%.

Unique Item[]

Tsukatsuki Rio does not have Unique Item.

Bond[]

V • T • EAffection Rank BonusAffection
Theme 265
Memorial LobbyBondBlue Font 6Total Stats ~ ATK+128 / HP+1270
LV02-05ATK+2
LV06-10ATK+3
LV11-15ATK+4 / HP+61
LV16-20ATK+5 / HP+73
LV21-30ATK+1 / HP+12
LV31-40ATK+2 / HP+18
LV41-50ATK+3 / HP+30

Etymology[]

Tsuka (調) means either "tune", "tone", "meter", "prepare", "exorcise", "investigate", "harmonize", or "mediate".

Tsuki (月) means either "moon" or "month".

Poll[]

Trivia[]

  • Rio's nickname is based on "Big Brother" from George Orwell's novel, Nineteen Eighty-Four.
  • In a developer commentary, isakusan mentioned that Rio was originally primarily designed as an imposing, controlling villain before SeongMin fleshed her out, ending up with her seeker-complex which gave birth to her rivalry with Himari while still attempting to seek her understanding.[1]
    • In addition to her personality, the full black scheme of her outfit was done by Mx2j to set up a contrast between her and Sensei, alongside some unstated personal desires.[2]
    • Additionally, Rio's obsession with outdated designs led to the decision of the current design for Mister Avant-Garde with the intentions of making Rio cuter and allowing players to accept her easier.[3]
      • The creation of Mister Avant-Garde also caused it to have a cult-like popularity around the developer team.[4]
      • Avant-Garde had similar appearance to Mandler from Terra Cresta, most notably due to having extra set of arms.
  • She became the first student released in a Fest banner as a Special unit during the game's 4th anniversary.
  • Rio also made major roles during the events of CODE:BOX and later Decagrammaton where she resurrected Key to solve the remaining sefiras.
  • In merchandising, when Seminar received their Chocopuni Plushies from GoodSmile, Rio was conspicuously absent, and had the distinction of being the only member of her own club to be left out of a Chocopuni. She later received her own plushie when Seminar was re-run.

References[]

Navigation[]

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