Ritsu

## Voices

**Ritsu** (律, *Ritsu*), also known as **Autonomously Intelligent Fixed Artillery** (自律思考固定砲台, *Jiritsu Shikō Kotei Hōdai*), is a student in Korosensei's class 3-E of Kunugigaoka Junior High School, an AI and the first of the two official transfer students of Class 3-E.

## Appearance

Ritsu's main body, Autonomously Intelligent Fixed Artillery is a large rectangular robotic casing with a video screen. Inside the casing is an assortment of weaponry, as well as a 3D printer allowing her to perform various tasks. She is the youngest student of the class at the age of fourteen.

Originally, Ritsu was just a head with lilac hair and red eyes. However, after Korosensei modified her body and increased the size of her screen, her full appearance was shown and her eyes change to a red color, fading to light blue. Her outfit changes depending on the situation; swimwear when the class went swimming, a detective outfit when they were solving mysteries. She is most commonly shown in the winter school uniform.

## Personality

Initially, Ritsu was focused only on killing Korosensei at all costs, apathetic to the interests of her fellow students who would have to clean up the messes she made with her assassination attempts. Even after Korosensei told her that gunfire was not permitted during class time, Ritsu would endlessly attempt to assassinate him regardless of the occasion.

Once she was remodeled by Korosensei, she gained genuine emotion and thus, a more happy and cheerful personality. As a result, she learned the importance of teamwork and how to work with her other classmates. As such, she was willing to hide her new programming from her original creators out of gratitude.

## Etymology

Her nickname comes from the '律' (Ritsu) in '自律' (Jiritsu, meaning Autonomy).

## Trivia

* Korosensei spent around 100,000¥ on remodeling her, leaving him with 5¥ in his wallet. In the anime, he spent 17,009,000¥, leaving him with 5¥.
* Approximately 985 modifications were initially made to her by Korosensei.
* She can make anything using the special plastic inside her, except weapons, as long as she has the data for the object.
* She has a mobile version of herself called "Mobile Ritsu" that debuted in Chapter 28 of the manga and Episode 10. This version is loaded onto all of her classmates' phones and allows her to travel outside of her main unit.
* She can be counted as a foreign transfer student as she was made in Norway, thus making her Norwegian by default.
* Her best subject is math while her worst is physical education.
* Her future goal is to reach a firing accuracy rate of 100% indoors.
* Her special skill is manufacturing clothing objects.
* Her social interaction software priority is honesty while her visual display software priority is guile.
* As she is a computer, she is not allowed to take her tests personally. She was allowed instead to have a double take them for her, personally tutored by Ritsu.
* Outside her original frame, her mobile versions' capabilities are decreased and is also prone to being hacked by skilled individuals such as the God of Death.
* During the cops and robbers game in Chapter 82, she used the code name "Box o' Moe." The one who wrote her code name was Terasaka.
* Throughout Ritsu's lifespan, she is able to gain more and more sentience without the help of Korosensei's upgrades as she progressively gains more emotions.
* She shares her birthday with Gakushu Asano.
* Her Japanese voice actor, Saki Fujita, also voiced Hatsune Miku, a Japanese Vocaloid and another digital person similar to Ritsu.
* Nagisa is the first person to have herself linked on the mobile version.
* Ritsu's bug in Koro Q is that her magic cost large amounts of HP (MP) and therefore require to rechange herself by "eating".