is a Japanese anime television series created by Kia Asamiya. The anime series was produced by Nippon Animation and broadcast on NHK Educational TV from 1999 to 2000. It was licensed for North American release by Viz Media, and the series aired on Cartoon Network outside the United States.

Two manga series were also released: a two volume series by Asamiya and published in Ciao from 1999 to 2000, and a nine volume two-part series by Keiko Okamoto which was published by NHK Publishing. The second manga series was licensed in North America and translated into English by Tokyopop beginning in 2002.

It was created based on the Japanese novels "Nanso Satomi Hakkenden". The series follows a basic Magical girl progression, but Corrector Yui's magic powers are all derived from and incorporated entirely into her digital avatar as antivirus software for the virtual world, with no real powers granted outside of the network.

Plot In the year 2020, computers have become an integral part of society, with the Internet having evolved into a virtual reality called "ComNet". A teenage girl named Yui Kasuga is one of the few people who cannot use computers at all, despite her father being a software developer. An evil host computer called Grosser seeks to take over both ComNet and the real world. In response, eight software programs were developed to correct Grosser's evil intentions; however, they are digital avatars which exist only in ComNet and require the help of a human "Corrector." Yui is sucked into the ComNet, where she is recruited by I.R., one of the eight programs, and receives Element Suits which allow her to transform into the ComNet Fairy "Corrector Yui" and fight against Grosser's evil software.

In the first season, the series revolves around the war against Grosser and the mysteries surrounding the Correctors, their seemingly missing creator, and the relationship he seemingly had with the corrupted software.

In the second season, Yui and the Correctors fight against Beagle, a computer virus that threatens ComNet, while dealing with the mysterious Corrector Ai, a Corrector who tends to work on her own and seems to have her own agenda. The key to the mysteries seems to be a mysterious young girl who may be related to appearances of the virus.

Characters

Main /

A 14-year-old girl who aspires to become a manga artist or voice actress. Over the course of the series, Yui improves her abilities and grows as a person as she assumes the secret online identity of "Corrector Yui". While unskilled at academics and physically interfacing with computers, in ComNet she possesses the ability to correct computer viruses and software bugs and is a powerful fighter as Corrector, able to undo damage and battle the strongest of Grosser's henchmen. Her optimism and ability to cheer up others is one of her greatest strengths, making her easily likeable by her peers and fellow Corrector programs. She also has an empathetic personality that helps her understand the nature of AI programs she meets on the ComNet. In the first season, it is revealed that her singing voice has the ability to normalize programs. In the second season, she upgrades to Advanced Elemental Suit and later Final Element Suit in the finale. / /

Yui's best friend. She has a polite, calm, and caring personality. Her intelligence and innate ability with computers, as well as her voice being able to normalize programs, made her a perfect candidate for Corrector, as expected by Professor Inukai. She was originally supposed to be a Corrector, but Grosser's intervention caused I.R. to confuse her with Yui. When Professor Inukai was passing Corrector tasks and abilities to her, Grosser's manipulation causes her to become Dark Angel Haruna before she is eventually saved by Yui. In the second season, she returns as a Corrector to assist Yui, first when Yui is petrified by infected insects. She can use Element Suits more effectively than Yui. Her Basic Elemental Suit is reminiscent of an angel. /

Shun's cousin. A dark and mysterious girl who becomes a Corrector on her own in the second season to search for the "little girl", believing she may be connected to her mother's coma. Her bitter past experiences seem to be the reason for her cold, apathetic demeanor as a mask to protect herself. While she mostly does her job with cold, no-nonsense efficiency, Yui's actions sometimes force her to reconsider and help her. She initially despises Yui and considers her a nuisance, but comes to admire her optimistic view on life and ability to cheer up others. Her Basic Element Suit is reminiscent of a maid.

Professor Inukai is the creator of Correctors and Grosser. He attempts to stop Grosser by sending Correctors, but is left comatose after Grosser intercepts him. His mind, incomplete and amnesiac, wanders the Net while seeking help and evading Grosser's henchmen. He eventually recovers and passes on his Corrector abilities to Yui, helping her build Element Suits and providing a base of operations for the Correctors.

Family

Ai's cousin. An engineering/medical student and Yui's love interest, which he is unaware of. Very skilled with computers and the ComNet, he often indirectly helps Yui in her task as Corrector. At the end of season one, Grosser abducts him as bait to lure Yui and the other Correctors to battle him in his lair. In the second season, he leaves for the United States to study.

Yui's father. A computer programmer and the head of the project team that developed the virtual amusement parks Galaxy Land and Marine Adventure Net. He loves Yui dearly and is distressed when seeing her with guys, especially Shun.

Yui's mother. An excellent cook, whose work is highly favored by Yui and her father.

Ai's mother. A motherly figure whom Ai loves dearly. She fell into a coma after an accident that severed the connection between her mind and body. Her mind is imprisoned by Ryo Kurokawa after she attempts to release the "missing little girl", causing an accident that kills Ryo and releases the girl into the ComNet. By the final episode, her consciousness is freed from ComNet and she awakens from her coma.

Ai's father. He and Ai's mother originally belonged to the science team that created the ComNet. His death ten years ago triggered Ai's attempt to mask her heart, initially to make her mother less worried.

Classmates and teachers

Yui's childhood friend and Haruna's boyfriend. His demeanor contrasts with Haruna, often making him a target of jokes by Yui and her peers, though he is a nice boy at heart.

Yui's best friend.

Yui's best friend.

Yui's friend.

Yui's friend.

Yui's teacher. Though supportive, her childish personality sometimes causes trouble.

Correctors Eight softwares who have a close relationship with Yui throughout the series and, except for I.R. have the same appearance as humans. They were originally one software called the Corrector, but were broken down into eight softwares as a result of Grosser's attack. As such, each piece of software concentrates on a specific task, and Yui must learn to integrate their skillsets to defeat Grosser's minions and eventually Grosser himself. In the finale of the first season, it is revealed that the way they correct Grosser is their self-sacrifice. In the second season, Correctors and Yui deal with the unknown computer virus Beagle.

Corrector Software No. 1, The Regulator. Yui meets him in a space adventure site resembling a MMORPG. He has the ability to temporarily stop time, enabling him to move at light-speed velocity. His power in the Wind Element Suit allows Yui to stop time for about 15 seconds, which can be upgraded to 30 seconds if other Correctors such as I.R. borrow its power. Though nice, he has a "hero-guy" type personality and insists on being the team leader and a great hero, which initially causes Yui to dislike him and sometimes puts him at odds with the other Correctors. He mainly serves as comic relief, especially in the second season.

Corrector Software No. 2, The Synchronizer. Not much is known about him, since he was lost at the beginning of the series. At the end of the first season, it is revealed that he was corrupted and became the Corruptor program War Wolf. His ability is similar to Wolf, using fire bursts as weapons, and he has excellent fighting abilities on his own. His power of fire can be bestowed to other Correctors, allowing them to access the Fire Element Suit. He has a loyal personality and seems to have feelings for Yui, confessing to Inukai that he wants to follow her until the end. The Beagle virus forces him to stay in War Wolf form for most of the second season, reminding him of his previous bad deeds and causing him to become rather explosive, which is worsened by Yui's attitude and her calling him "Doggy". In the finale, he returns to his original form and embraces Yui.

Corrector Software No. 3, The Predictor. Yui meets her on a love fortune-telling site. She has a wise, maternal personality and possesses the ability to foresee the future. However, her visions, while mostly accurate, can sometimes deviate, especially when she does not have enough data/knowledge about the subject. Her power enables Yui to access the Wind Element Suit and grants her the ability to predict enemies' movements and attacks. She often becomes a subject for Control's flirting, but evades it due to her ability, leaving Control in distress.

Corrector Software No. 4, The System Maintainer. Yui meets him on a rainforest-like simulation. He has the ability to control nature, like water and plants. His power enables Yui to access the Water Element Suit and grants her the ability to control nature at will, which she can use as a defensive, recovery, or offensive tool. He has a rebellious, childish personality and dislikes anyone who desecrates nature, to the point of kidnapping those who litter on the rainforest simulation. When Yui meets him, he initially hates Professor Inukai, whom he believed had left him. However, he learns that Inukai actually loves him and the other Correctors and left him there for his own safety.

Corrector Software No. 5, The Repairer. She has the ability to heal damage, including Element Suit damage, and her power in the Water Element Suit grants Yui the ability to summon a barrier that can repel attacks. She has a sweet, naive and energetic, and polite personality. She is not prone to fighting, and her fighting style involves using non-lethal force and utilizing a vast array of traps and gadgets, leading to her calling herself the "Trap Princess". Her antics and naivety disturb Freeze, whom Rescue seems interested in. In the second season, she fights using bandages from her halo and anti-Beagle spray, and can detect virus sources using a radar on her halo.

Corrector Software No. 6, The Archiver. A pacifist old man who calls himself a "Peace Defender", but ironically has a knack for building destructive weapons. He initially dislikes Yui for destroying his solitude in the remote area he inhabited, but later helps her drive away Grosser's Corruptors by lending her his power. His power enables Yui to access the Fire Element Suit and the "Flame Bomber" projectile attack. A wise person, he always speaks what he feels is right, even if it causes conflict with the other Correctors. In the second season, the Corrupters use his data to clone him, wreaking havoc on the ComNet and causing the distraction they needed to carry out their plan.