Humans
The story's protaganist, Hideki is an Ordinary Cram School Student who lives in a Japan where almost everyone has his or her own "Persocom" to do common tasks, ranging from household chores to surfing the Internet. Now, Hideki would very much like his own Persocom, but there's no way he can afford one... until he finds one lying in the trash. Little did he know that this persocom girl would change his life forever...
- Accidental Pervert: He is prone to accidentally seeing Chii when she's naked or somehow revealing a precious body part. This happens in the anime much more frequently than in the manga.
- Adaptational Badass: Shows to be incredibly strong in the anime, able to carry a shut down Chi walking what appears to be several blocks and he even attempts to carry her over a long steep ridge. On top of that he goes into a few fights in the anime and exhibits some techniques such as sweeps. Justified as Hideki is established to have been helping out on his family's farm before moving to Tokyo in the anime.
- Alcohol-Induced Idiocy: During a drinking session with Takako at his place, he got so drunk that he apparently did the full monty.
- Beady-Eyed Loser: His eyes are drawn with noticeably smaller pupils than other characters have (or any other character created by CLAMP in general). He's also very much a Butt-Monkey despite being the main protagonist.
- Butt-Monkey: Nothing ever goes right to the poor guy, which ranged from mere misfortunes to people constantly remind him that he's "a nice guy that can't get himself a girlfriend".
- Berserk Button: Pretty much anything involving Chi. Also on occasion, Sumomo's programming.
- Book Dumb: Not a stupid character but can't make the tests in university.
- Chivalrous Pervert: While he is a pervert, he doesn't really want to be one and genuinely tries to look after Chii.
- Color Motif: Hideki is heavily associated with the color green and is represented by it throughout the series. Most of his outfits are green, he was raised close to nature as a Farm Boy, he is a Naïve Newcomer when it comes to persocoms and the city life, he is very lustful, and is represented by a green character in Ms. Hibiya's book for Chi.
- Country Mouse: He came from Hokkaido and spends most of the first half of the series adjusting to Tokyo.
- Dub Name Change: Lee Hi-su in the Korean dub.
- Dumb Muscle: Not very bright intellectually but is noted several times to be an excellent workhorse thanks to his Farm Boy upbringing.
- Farm Boy: He starts out as this and has huge problems when he goes to the big city (Tokyo).
- Flipping the Table: Once does this when he is frustrated with his homework.
- Half-Witted Hillbilly: A Book Dumb farmhand who came from a Hokkaido farm.
- Hopeless with Tech: Justified as he is too poor to own a persocom, and thus is hopeless when it comes to understanding their functions and norms of operation. Thankfully, Shinbo and later Minoru helps him out in this department.
- Imagine Spot: Gets into this a lot on Yumi, Takako, and Chitose during the first half of the series.
- Incoming Ham: His Thinking Out Loud is done in bursts.
- Interspecies Romance: Eventually with Chi, a persocom.
- Meet the In-Laws: A dramatic version happens at the final manga arc, as Chitose, the mother-in-law, narrates to him Chii's origins. Later on, Freya, sister-in-law, also gets to "interview" him. Both times, he won the approval of the in-law.
- Nice Guy: He is friendly and mild mannered, but being a Large Ham scares some people off. He's only overtly bothered by his girlfriend-less virgin status when other characters talk about how tragic it is that "such a good guy can't find himself a girlfriend".
- Nosebleed: Is a frequent sufferer of these in the anime, especially when Chii is being a Innocent Fanservice Girl.
- One Degree of Separation: At the start of the story, he already knows most of the human cast personally. The only ones who he doesn't know are the tech experts (Minoru and Kojima).
- Simple-Minded Wisdom: While Hideki is not very intelligent (struggling with cram school) and a virgin who has never had a relationship before, his words had a major emotional impact on both Yumi and Minoru. With his help, Yumi made up with Hiroyasu, and Minoru grew to love Yuzuki as an actual "person", and no longer just a surrogate for memories of his sister.
- Thinking Out Loud: Often happens to him, since he lives alone before picking up Chii. He comments that it's because he's used to living on a farm where the only ones to overhear him are cows. This has caused him some major embarrassment.Hideki: Where can I buy inexpensive panties? I really need to buy panties!"
- Unlucky Everydude: His defining character trait. He has problems to fit into his new city life, rather sucks at university, is helpless with technology and is rather unlucky. Chi is the best thing that ever happened to him.
Hideki's good friend and fellow cram school student. He's the owner of Sumomo, whom he frequently lends to Hideki.
- Dogged Nice Guy: He keeps pushing the issue with Takako. He won't let it go, no matter how much she reminds him of the barriers between them.
- The Lancer: To Hideki during Chii's kidnapping and rescue. He was the one who joined Hideki with the search on foot, and suggested keeping Kotoko at Hideki's place and recording Kojima's statement that he had "willingly" relinquished Kotoko's control to Hideki.
- Mr. Exposition: He is one of Hideki's guides to persocoms alongside Minoru, though he usually takes care of the basic stuff.
- Teacher/Student Romance: He eventually marries Shimizu-sensei.
Hideki's landlady, who always greets him with a kind, gentle smile.
- Benevolent Boss: Treats her tenants with respect and kindness.
- Big Good: She is a co-creator of the Chobits with her husband, Chi's "mother", and the one writing the books that Chi reads which develop the "person just for me" plot thread.
- Broken Bird: She may be an Onee-sama to Hideki, but she also lost her twin persocom daughters due to one of them falling in love with her husband. Then, her husband died. To rub salt to the wound, her amnesiac daughter ends up living in the apartment which she rents out, and she can't do anything other than observe from a distance.
- Motherly Scientist: A former programmer and is the literal mother of Chi.
- Nice Girl: She always friendly, is on good terms with Hideki and instantly likes Chi.
- Reasonable Authority Figure: Has no trouble adjusting her rental dues to accommodate the struggling Hideki.
- Renaissance Man: She's been a scientist, a landlady and a children's book author.
- Smart People Wear Glasses: In her past as a persocom scientist.
- Stacy's Mom: Hideki has wet dreams about her from time to time.
- Stepford Smiler: She never fails to greet Hideki with a smile whenever they meet; she often cries when reminiscing about her husband or her twin persocom daughters.
- Team Mom: Of sorts. She's always there to help Hideki (and Chii) out with their problems.
- Walking Spoiler: Has a secret connection to a major character that is very integral to the plot.
A persocom/tech expert, Minoru was introduced to Hideki by Shinbo, to help Hideki find out who/what Chii was before she lost her memories. He owns several persocoms, with Yuzuki as his favourite.
- Character Development: From a person who tries to view persocoms as objects and strives to have a professional relationship with them, to one who sees them as individuals in their own right, to be loved if a person chooses to do so. This is made especially clear to him when Yuzuki attempts to hack the national data bank and becomes comatose, realizing Yuzuki has become just as irreplaceable as Kaede.
- Child Prodigy: Is a pint-sized computer whiz. It is deconstructed in that it is implied he was this good with technology at such a young age due to his Lonely Rich Kid status, that is, his status as such provided both the resources and the motivation to become as good as he is to rectify the "lonely" part.
- Covert Pervert: Possibly, if the skimpy outfits he has his custom-build persocom maids (except Yuzuki) wear is any indication.
- Dub Name Change: Deokgo Jeongmin in the Korean dub.
- Lonely Rich Kid: Parents are absent (very likely deceased), elder sister passed away also. Also has lots of money, which certainly helps him with his "computer whiz" part. His only companion is a persocom which he built himself as a replacement for his sister.
- Mr. Exposition: He is one of Hideki's guides to persocoms alongside Shinbo, though he usually takes care of the more advanced stuff.
- Not So Stoic: Minoru is generally detached but his emotions slip up every time any of his friends and loved ones are in trouble.
- One-Letter Name: His username is M.
- Second Episode Introduction: Introduced in the anime's second episode along with Yuzuki.
- Smart People Wear Glasses: An unusual case, as he only wears glasses while busy.
- Troll: It's implied that he dresses his persocom maids in skimpy outfits to get a rise out of his guests. Crosses over with Covert Pervert.
- TV Genius: He's super good with technology but also speaks in very tiring monotone voice, has boring interests and doesn't seem to ever leave his house. However he dresses his persocoms in a very suggestive way.
Hideki's teacher at cram school.
- Armor-Piercing Question: To Hideki.Takako: "Do you like being with a persocom more than with a human?"
- Dub Name Change: Cha Myeong-hwa in the Korean dub.
- Hot Teacher: Hideki and Shinbo's prep school instructor and the show's resident Ms. Fanservice who is The Tease to boot.
- Ms. Fanservice: The show's resident Sexy Mentor. During the Beach Episode, her swimsuit shows the most skin.
- Misplaced Kindergarten Teacher: Aside from being The Tease, she generally acts a bit too upbeat for a teacher at a cram school for college exams. Justified since she wanted to be a kindergarten teacher, but her husband thought there was more money in teaching older students.
- Sexy Mentor: Has no problem being The Tease towards Hideki and eventually gets in a Teacher/Student Romance with Shinbo.
- Sympathetic Adulterer: Since her husband essentially discards her in favor of their persocom, no one blames her for finding love with Shinbo while still not officially divorced/annulled.
- Teacher/Student Romance: Shinbo eventually marries her.
- The Tease: Towards Hideki during the one time she stayed in his apartment.
- Trauma Swing: Is caught doing this in a flashback by Shinbo, and she tells him that her husband's basically forgotten her because of their persocom which he's become obsessed with.
Hideki's former employer (in the manga), who runs his own bakery, and later becomes Chi's employer.
- Age-Gap Romance: His Second Love is eighteen years younger than him.
- Benevolent Boss: Treats his employees with respect and kindness.
- Conveniently an Orphan: This conversation between him and Hideki.Hideki: Didn't your parents object [to marrying a persocom]?Hiroyasu: Both of my parents had passed away.
- Dub Name Change: Woo Yeong-jae in the Korean dub.
- Interspecies Romance: He was married to his persocom.
- Nice Guy: Personality-wise, one can hardly find any faults with him, apart from his... unusual choices of partners.
- Older Than They Look: So much so that Hideki is surprised when he's told of Ueda's real age (36, making him twice as old as his love interest Yumi). He lampshades it by saying that people tell him he has a baby face.
- Robosexuals Are Creeps: While Chi is kidnapped and held captive Ueda confesses to Hideki that he was married to Yumi, his persocom. During his marriage he had to put up with friends and neighbors cracking jokes at his expense, and says that since his parents had passed away long ago, they couldn't have objected. When she started to malfunction she couldn't be fixed, since she was a discontinued model, and he was devastated every time a persocom expert nonchalantly told him to just get a new one. After Yumi "died" by pushing him out of the way of a speeding car, Ueda held a funeral for her, which became a media sensation due to the fact that anyone would mourn a broken down persocom as much as he did.
Hideki's colleague at the pub where he works part-time. She has a particular dislike of human-sized persocoms.
- Age-Gap Romance: She's still a high school student but is eventually the Second Love to a guy in his thirties (who, to be fair, looks great for his age).
- Buxom Beauty Standard: Her large breasts prove to be attractive to Hideki.
- Contrived Coincidence: She was the next assistant to work at Ueda's bakery after Hideki left the job.
- Dub Name Change: Kang Yu-mi in the Korean dub.
- Genki Girl: Usually, unless where Ueda is concerned.
- Identical Stranger: To Ueda's persocom wife, minus the Unusual Ears. She even has the same name. Yes, this causes issues.
- Ms. Fanservice: She's the character Hideki sexualizes the most in his Imagine Spots.
- Naked Apron: In one of Hideki's Imagine Spots.
- Related in the Adaptation: In the manga, she is just one of the pub's employees. In the anime, she is the daughter of the pub owner.
- Romantic False Lead: She's the character Hideki gets the most Ship Tease with after Chi. It's moot since Chi and Hideki are advertised as the Official Couple anyway, plus it turns out she's always been in love with someone else (Ueda).
- Second Love: For Ueda. Unusual in that the guy's first love is a non-human.
- Stalker with a Crush: She regularly watches over Ueda long after she parted ways with him.
- Trying Not to Cry: When she saw Chii wearing her old bakery uniform.
Another tech/persocom expert like Minoru, but employs rather shady methods to satisfy his curiosity. He's the original owner of Kotoko. His online moniker is "Dragonfly".
- The Atoner: Helps Hideki and the gang to make up for kidnapping Chi.
- Dub Name Change: Do Yeong-man in the Korean dub.
- Once Done, Never Forgotten: Minoru and Hideki never lets him forget that he once kidnapped Chii.
- Smart People Wear Glasses: Yes, despite the fact that he can be a bit of a Jerkass at times, he actually does bring some pretty good information to the table most of the time. Although Hideki just thinks it's always false.
- Smart People Build Robots: And he has over 20 of them that he built including Kotoko.
Persocoms
The persocom whom Hideki finds in the trash. With Hideki's help, she spends the first half of the series adjusting to the real world, as she apparently was not programmed to do so. However, it eventually became clear to Hideki that she is more than what she appears to be.
- Adaptational Wimp: In the anime, her ultimate form shuts down all Persocoms and can cause power outage which is impressive...except in the manga she can actually cause physical destruction, which is shown to be at least powerful enough to destroy a block's pipe system and cause it to burst out of the ground.
- Artistic License – Physics: She is a lot heavier when switched off. While this might make it harder to steal her, it doesn't make sense from a scientific viewpoint.
- Because You Were Nice to Me: Hideki's kindness toward her made Chi become very devoted and loyal toward him to the point of eventually falling in love with him.
- Constantly Curious: From the moment she's switched on, she is curious about everything Hideki does, although it's mostly not much. She also puts herself in danger when looking for a job and landing in the hands of Yoshiyuki Kojima.
- Cute Mute: A cute Persocom who initially can't talk. However, she doesn't stay mute for long.
- The Cutie: She is naïve, pure-hearted and unbelievably adorable. She's so adorable that you may die of cuteness.
- Elegant Gothic Lolita: Majority of Chi's clothes are frilly and doll-like.
- Giving Someone the Pointer Finger: She points at people and things which she learns about. No one minds, because she's too gosh darn cute (though they do advise her gently not to do it again).
- The Glomp: Jumps and hugs a lot, especially at the start, because she hasn't grasped that it's not polite to do that in public.
- Hair of Gold, Heart of Gold: Her long blond hair is reflective of her innocence and kindness.
- Heroic Sacrifice: Gave up her memories and the chance to stay by her parents' side so that her sister's data would not be lost. She's reactivated not long after that, but her memories stay gone.
- Innocent Fanservice Girl: Having no memories also means she doesn't have a nudity taboo. Also, she wears a Naked Apron without having any idea what it means, because she thinks it would make Hideki happy.
- Interspecies Romance: Eventually with Hideki, a human.
- Is It Something You Eat?: Her response when she is being told she's been "abducted."
- Laser-Guided Amnesia: Ms. Hibiya reformats Chi to ensure her daughter would fall in love of her own free will.
- Longing Look: From the moment she sees the picture book in the book store, she identifies with the main character and gets sucked in immediately. This turns out to be an important plot point later.
- Magical Girlfriend: Hideki is an unlucky loser but when he finds her, his life changes a lot. She is beautiful, kind and eternally devoted to him.
- Meaningful Name: While it's not clear until near the end of the series, Chi comes from Chobits, originally Chii/Elda and Freya's password, which was really a made up word from 'chobi' and Chitose's name by their creator-father.
- "Chii" can also be interpreted as a romanisation of the greek letter "×", which in the Japanese language is used as a null letter. It is fitting considering Hideki finds her in a completely blank state and it is the only thing she can say, essentially saying it wherever normal words would be used. In a meta sense, CLAMP would also use the letter in their series ×××HOLiC.
- My Sibling Will Live Through Me: She takes it upon herself to perform a Brain Uploading on Freya's behalf to her own sister, so her sister would survive.
- Naked First Impression: Introduced covered only in few and tattered Sarashi.
- Never Learned to Talk: She starts out as a Cute Mute who can only say "Chii", though she learns to speak soon enough. Later subverted when it's revealed that she'd only forgotten how to speak after her memories were wiped; in her past as Elda, she could speak.
- Nice Girl: She is incredibly innocent and kind-hearted.
- Pokémon Speak: At first she can only say "Chi!", but she learns to say more later on.
- Power Glows: She begins glowing brightly whenever she is levitating, doing intense introspection, and especially when she is threatened in any way. If she is glowing while looking at you angrily, it is already too late to run away. This is due to Freya taking over to protect her sister.
- Robot Girl: She is a persocom but with some specialities. All of her software seems to be erased but she still can learn.
- Sexy Santa Dress: Wears a Santa dress in an Omake pic in the Manga.
- Simpleminded Wisdom: Due to not having very keen social sense and an overly-direct method of thinking, Chi is oftentimes able to help people through problems by asking an Armor-Piercing Question or Stating the Simple Solution that gets directly to the point of the matter.
- Superpowered Evil Side: Freya isn't really evil, but she is laser-focused on one thing and one thing only: keeping Chi safe and happy. Anyone who jeopardizes that runs the risk of having Freya manifest and do whatever it takes to protect her sister. The sudden switch from Chi's generally pleasant facial expressions to Freya's cold and angry ones is quite unsettling.
- That Man Is Dead: After she's reformatted, Chi is only addressed by her new name instead of her original name of Elda.
- Third-Person Person: Even after learning how to speak properly beyond her initial Pokémon Speak phase, she still refers to herself in the third person as "Chi".
- Undying Loyalty: Chi gradually become very devoted to Hideki due to his kindness and start to constantly look up to him whenever he feel troubled. And this is even before her eventual Relationship Upgrade with him.
- Verbal Tic Name: Initially, the only thing she can say is "Chi", which is what Hideki decides to name her. She eventually learns how to speak, though she'll still say her name when she's puzzled or happy.
- What Is This Thing You Call "Love"?: She has to figure out what love means before she can choose "the one for me and only me".
Shinbo's persocom, whom he loans frequently to Hideki. She's palm-sized, and thus not very powerful in terms of processing power. Her name means "plum". Later in the story, Shinbo gave her away to Hideki.
- Bedlah Babe: She's wearing an Arabian-inspired outfit.
- Boke and Tsukkomi Routine: With Kotoko after she joins the team. She is the one getting smacked for being silly.
- Cute, but Cacophonic: Sumomo is cute, small, charming, and VERY, VERY LOUD.
- Genki Girl: With shades of Cloud Cuckoolander as well. She is very hyperactive and just can't sit still. You can blame Shinbo for this.Sumomo: "Sumomo is programmed to dance when on standby!"
- Kawaiiko: She is cute and cheerful and says things like 'Wakey, wakey exercises'. Again, Shinbo programmed her this way.
- Large Ham: Sumomo is loud and theatrical.
- Literal-Minded: Being a Mobile Unit persocom, she lacks the processing power to handle more abstract requests or tasks and will interpret things in the most literal manner possible. This causes Hideki and Kotoko no shortage of pain.Hideki: [Trying to interpret the meaning of an image] Sumomo, do you know what this is?Sumomo: This is....AN ATTATCHED IMAGE FILE!Hideki: WELL I KNEW THAT ALREADY!
- No Indoor Voice: She cannot even keep her voice down thanks to how she is programmed.
- Non-Standard Character Design: This is a little more noticeable in the manga, but Sumomo lacks the "ears" (connector ports) that a number of other persocoms (apart from Yuzuki and Kotoko) have. Justified though, in that she's a custom design. The access port function is instead provided by her entire headgear. Where else would you fit a coil that could hold all that cabling?
- Rule of Cute: Lots of stuff that she does is because Shinbo programmed her that way. Hideki does sometimes grumble about Shinbo's programming.
Minoru's chief persocom. Minoru cares greatly about her.
- Dub Name Change: Roji in the Korean dub.
- Divergent Character Evolution: After her failed hack on Zima damaged her data which replicates Kaede's personality, Minoru decided not to replace the lost data, and convinced Yuzuki that she can be her own "person". Just before the final manga arc, when Chii noticed that Yuzuki was speaking differently, Yuzuki cheerfully admits that she's ok with that.
- Non-Standard Character Design: Lacks the "ears" that most persocoms have (save for Sumomo and Kotoko), although justified by being a custom design. It's also possible that they're hidden by her hair.
- Replacement Goldfish: Minoru modelled her to be a replacement for his sister. At least at first he did, then he decided to let her develop organically.
- Robot Maid: Wears the Meido outfit, although her status is more akin to that of a butler. Besides domestic functions, she's also a surrogate elder sister and hacking device.
- Second Episode Introduction: Introduced in the anime's second episode along with Minoru.
Kojima's persocom. Palm-sized like Sumomo, she is more powerful due to being custom-made by her master.
- Aloof Dark-Haired Girl: A black haired persocom who Cannot Tell a Lie to the point of Brutal Honesty.
- Boke and Tsukkomi Routine: With Sumomo. She's the one doing the smacking.
- Cannot Tell a Lie: Because of her programming, Kotoko is programmed to never lie, even when it's non-beneficial to her master.
- Deadpan Snarker: Tends to snark with an unimpressed look when she acts as the Only Sane Man.
- Dub Name Change: Koko in the Korean dub.
- Expy: Seems to be a Blue Oni persocom version of Li Meiling from Cardcaptor Sakura, which is another Clamp work.
- Foil: She's programmed to be very snarky in contrast to always upbeat and hyperactive Sumomo.
- Non-Standard Character Design: Lacks the "ears" that other Persocoms have. Justified in that she's a custom design and her cables are in her bells.
- Pint-Sized Powerhouse: Although she's the size of a Mobile persocom, she has processing power on par with full-sized units and then some thanks to Kojima's customization.
- Red Oni, Blue Oni: The blue to Sumomo's red due to her dry wit and lower energy.
- Surrounded by Idiots: She feel this way regarding everyone in Hideki's room after he took her in, though knowing Hideki, Chi, and espectially Sumomo, you can't quite blame her.
- Tsundere: The Harsh type. Despite being annoyed by Hideki's group and their odd antics, she does seem to be content with staying with them.
A persocom who has long since shut down. Her master's experiences with her affected his subsequent relationship with a human girl.
- Good Old Robot: Her master could have transferred her memories to a new hard drive, but he refused because the transfer might not have worked. He couldn't let go of any part of her. Justified, as Ueda actually married her. At the same time, the concept is deconstructed, as the main reason why the transfer might not have worked was that she was an obsolete model.
- Forgetful Jones: Due to her faulty hard drive, she began forgetting things she heard mere minutes ago, and her master had to constantly reintroduce himself to her.
- Heroic Sacrifice: Pushes her master out of the way of a van.
- Identical Stranger: Resembles a certain human girl her master met after her "death".
- Interspecies Romance: She was married to her master.
- Posthumous Character: She "died" before the start of the series after pushing Ueda out of the way of a car.
Freya
Chi's older persocom sister. After falling in love with her creator-father, the strain from the unrequited love eventually caused her systems to break down. Freya's younger sister Elda allowed Freya's programming to be transferred over to her own system, at the cost of Elda's memories.
- Big Sister Instinct: What any good elder sister will do when her younger sister gave up her memories to save her. She is quick to act when her younger sister is in danger.
- Brain Uploading: A literal example, as Chi transferred Freya's consciousness into her own body to save her sister.
- Chekhov's Gunman: Pictures of her are dug up by Minoru in forums (notably the one where she's in a fetal position which Minoru and Hideki mistook as Chi) long before her official introduction.
- Dark Is Not Evil: As mentioned, she has a dark motif associated with her. But, she gives good advice to her sister, and would protect her if things go south.
- Death by Despair: The emotional pain of loving her own creator, who only saw her as a daughter, eventually caused Freya to break down. As she describes to Chii, at that state the unrequited love made her just want to turn herself off forever, with the final push being her confession to her creator and knowing the answer already. She only didn't completely cease to exist because of Elda's sacrifice.
- Elegant Gothic Lolita: Her attire is far more frilly than all of Chi's frilly clothes put together, but also in much darker colors.
- Meaningful Name: Freya is the name of the Norse goddess of love and fertility. She was originally created to be a daughter to the barren Chitose and be able to love in return.
- Parental Incest: An unrequited example. While they weren't biologically related, she fell in love with her creator, who only saw her as his daughter. This and the fact she loved her "mother" and didn't want to hurt her ultimately caused such emotional strain she broke down and eventually ceased to function all together.
- Pretty in Mink: One of her dresses in the manga is fur-trimmed.
- Sibling Yin-Yang: To Elda, after she lost her memories. While Chii is naïve and carefree, Freya is serious and carries some pretty hefty emotional baggage with her.
- Super Prototype: Her sister and her are the legendary "chobits" whose specs are higher than the standard issue persocoms. She was also the first, Elda being the Beta to her Alpha.
- Used to Be a Sweet Kid: Before her emotional issues popped up, she was just like her sister.
- Virtual Ghost: Literally, as her consciousness is the only essence of her that remains. She only ever appears in her sister's memory or if she takes over her Chi's body when her sister is in trouble.
- Walking Spoiler: Saying anything about her would immediately spoil the main twist of the plot.
- You Wouldn't Like Me When I'm Angry!: Threaten her cute, amnesiac younger sister, and she will take over her sister's body and tear you a new one. Kojima found this out the hard way.
Two persocoms who work for the government. Zima serves as the national data bank for the Japanese government and Dita as a pro-active firewall program.
- Big Bad Duumvirate: Seem to be this, given that the government's goal is to stop Chii from executing her final program and the anime DVD front cover suggests they are the main antagonists. However, Zima has his doubts about if it's the right thing to do, and even disables Dita to stop her from trying to forcibly stop Chi.
- Bodyguard Crush: It is implied that Dita has a vested interest in protecting Zima beyond her programing. Dita becomes this after Zima prevents her from stopping Chi's programming and risk damaging herself by disabling her.
- The Chessmaster: Zima was the anonymous individual that sent the photos of the Chobits and the map of Chii's location, and judging from what he says to Dita in the end, he did so because he wanted Chii to be happy, knowing her feelings would impact if the program would need to be activated.
- Curiosity Causes Conversion: Part of Zima's motivation in helping Chii is that as the national databank, he's programmed to seek out information, of which he has none concerning what exactly would happen when Chii executes her final program. While Dita is resolved to stop whatever's going to happen before it even has the chance, Zima over time grows more and more curious, which is what ultimately fueles his actions later in the series and leads him to become genuinely invested in Chii and Hideki's happiness.
- Hell-Bent for Leather: They wear mostly black leather outfits for Rule of Cool.
- Knight of Cerebus: Their introduction coincides with the story's darker and mature turn from a very lighthearted tone. Their existence also gave the series some Conspiracy Thriller vibes.
- No-Nonsense Nemesis: Dita, being programmed as a defensive firewall given physical form, does NOT play around or hesitate when it comes to doing her job. When Yuzuki attempts to hack into Zima's databank, she immediately counter-attacks and would have fried Yuzuki in an instant were it not for the cord Yuzuki was connected to burning out partway. when she discovers Chii's location and realizes she's about to launch her final program, she's on Chii in an instant, tries to send a wireless attack, tries to jack into Chii drectly when that fails and gets hogtied in wires for her trobule and THEN still manages to hack in using a loose USB cable and would have eliminated Chii right then and there were it not for Zima cutting the line.
- Punch-Clock Villain: They're villains only because they are programed to protect their creators/employers from being incriminated. Zima actually sends the photos of the Chobits and the map of Chi's location and even stops Dita from trying to disable her because he recognizes Chi's feelings are what will determine if the program's activation.
- Sunglasses at Night: They are only seen during night-time and don't take them off.