Tsukatsuki Rio-Halloween

Name: Tsukatsuki Rio. Age: 20. Height: 171cm.

Hair: long black hair that reaches her thigh with blunt bangs.

For her armed suit: Her hair is now done in ponytail, alongside a red and gray headpiece next to her right ear.

Eyes: red eyes with white pupils

Feature: has a metallic halo with two red curved lines opposite of each other within

Appearance: 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 wears an Millennium logo hairpin and a square watch on her left wrist.

In winter version: She was wearing a knee-length black coat, neatly buttoned, Black belt with gold buckle. Underneath, she was wearing a white turtleneck sweater. Below, she wore black tights and boots, she was wearing black gloves.

For her armed suit: Rio is wearing a dark gray tight bodysuit with light gray and red accent. She also wear a holster in her right thigh to store her handgun.

Personality: 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.". Rio is a cold person that 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 Millennium's 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.

Following her kidnapping of Arisu, 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 Arisu was prepared to lay down her own life to break the dimensional barrier protecting the Ark of Atra-Hasis and save Kivotos.

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 people to accept her easier. The creation of Mister Avant-Garde also caused it to have a cult-like popularity around the developer team. Avant-Garde had similar appearance to Mandler from Terra Cresta, most notably due to having extra set of arms.

Rio also made major roles during the events of CODE:BOX and later Decagrammaton where she resurrected Kei to solve the remaining sefiras. Kei’s revival was only possible because of Rio’s expertise knowledge related to the Nameless Gods. Although Himari possesses comparable technical skill, her expertise is limited to conventional Kivotos technology, and scanning the 2 KB Kei.sav file by the byte yielded no usable results.

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