The protagonist of the series. He lives in Room 5. He is a poor 20-year-old ronin studying for his college entrance exams after failing in the past year. He is madly in love with Kyoko.
- Accidental Pervert
- Anguished Declaration of Love
- Babies Ever After: With Kyoko.
- Belligerent Sexual Tension: With Kyoko.
- Betty and Veronica: The Betty to Mitaka's Veronica.
- Beware the Nice Ones
- Brown Eyes
- Butt Monkey
- Chivalrous Pervert: He may ogle Kyoko all the time but he would never coerce her into doing something she doesn't want to.
- Clueless Chick Magnet: He sometimes doesn't realize just how good-looking he is.
- The Ditherer: To his own detriment, Kyoko's annoyance, and the great comic enjoyment of everyone else. He never grows out of it, but he does learn to take responsibility for the decisions he does finally make.
- Dogged Nice Guy: To Kyoko.
- Drowning My Sorrows: With his best buddy.
- Get A Hold Of Yourself Woman: He one time slapped Kyoko, because she was just going too far in an argument they were having.
- Happily Married: To Kyoko.
- Innocently Insensitive: He can come off as a jerk, but he doesn't mean it.
- Likes Older Women: Though Kyoko is only about 2 years older than him.
- Longing Look: Many times for Kyoko. He just loves watching her taking care of her job.
- Love at First Sight: Kyoko enters the scene, he falls head over heels for her. Hard. Very hard.
- Ridiculously Average Guy
- Romancing the Widow: With Kyoko.
- Second Love: For Kyoko, although she has a hard time coming to terms with it.
- Sensitive Guy and Manly Man: The Sensitive Guy to Shun's Manly Man.
- Shirtless Scene: Several times and it can be seen that he has a quite nice body all in all.
- Starving Student: Godai works to pay for his studies, but he never has money for anything. And when he has some money, he spends it on presents for Kyoko.
- Umbrella of Togetherness: Sharing an umbrella was used many times for him and Kyoko as a loving gesture.
- Unlucky Everydude
- Will They or Won't They?: The relationship with Kyoko was teased througout. They Do. At the end, he and Kyoko get married and have a daughter.
- Yank the Dog's Chain: Happens to him SEVERAL times over the course of the story.
The female protagonist of the series. She is a beautiful, 22-year-old widow who takes on the task of managing a broken-down boarding house. She lives in the manager's room.
- Armor-Piercing Slap: Due to her latent Tsundere-ness.
- Babies Ever After: With Godai.
- Belligerent Sexual Tension: With Godai.
- Betty and Veronica: In a way she has been both; while she is the Betty to Ibuki's Veronica, she is the Veronica to Kozue's Betty.
- Cannot Spit It Out: For all the grief she gives Godai over his reluctance to break up with Kozue, Kyoko is equally guilty in terms of her relationship with Shun Mitaka. Though it's clear that she cares for him, it's also blatantly obvious that she doesn't see Mitaka as somebody she wants to marry. However, she doesn't say anything when Mitaka breaks off his engagement to Asuna to be with her, nor does she deny a relationship when Asuna politely confronts her about it. Even after meeting his parents, and being whisked away by Shun while Godai is screaming after them, she doesn't spit it out that she doesn't feel that way for him until the very last minute.
- Can't Hold Her Liquor: Usually avoids drinking too much as a result.
- Clingy Jealous Girl: Has shades of this. She doesn't like Godai seeing other girls but still bravely resists Ibuki's provocations.
- Drives Like Crazy: When she's upset.
- Dude Magnet: Unwittingly.
- First Girl Wins: Though is the first case of this in a Rumiko Takahashi series.
- Happily Married: To Godai.
- He Is Not My Boyfriend: In regards to Godai.
- Landlady: Trope Codifier
- May-December Romance: With her late husband.
- The Mourning After: Has a hard time letting go of her late husband.
- Plucky Girl
- Silk Hiding Steel: The only thing keeping Maison Ikkoku from descending into chaos.
- Single Woman Seeks Good Man: She doesn't like jerks, something both Mitaka and Godai know and use in order to get her to choose between them.
- Stepford Smiler: Despite her sunny disposition, she's still mourning her late husband.
- Teacher/Student Romance: She met her late husband while he was working as a temporary teacher at her high school.
- Tsundere: A sweet type B that only gets mad with a good reason. Kyoko's normally bright and pleasant, until Godai (usually) inadvertently does something to her displeasure.
- Widow Woman
- Will They or Won't They?: With Godai.
- They Do: At the end, she and Godai get married and have a daughter.
- Yamato Nadeshiko: Subverted. Her perfect Japanese housewife persona hides her repressed Tsundere nature and it's a way to cope with the loss of her husband.
A wealthy, educated young man who hails from an elite family. Mitaka works as a ladies' tennis coach more out of love for the sport than any need for financial support.
Voiced by: Kazuyo Aoki (JP), Daphne Goldrick and Kathy Morse (EN)
A short, middle-aged woman who is rarely seen sober. She lives with her husband and her son, Kentaro, in Room 1.
A mysterious man who finds enjoyment in mooching, voyeurism, and generally tormenting his next-door neighbor Godai. He lives in Room 4.
- Age Lift: While he was of a Vague Age in the manga/anime, in live action adaptations, he tends to get played by clearly middle aged actors.
- Accent Adaptation: Yotsuya's formal way of speaking is adapted into English as a quasi-British accent.
- Bunny-Ears Lawyer
- Cloud Cuckoo Lander
- Covert Pervert: Has a voyeuristic streak a mile wide.
- Expy: Rumiko Takahashi's Rumic World manga Dust Spurt has a secret agent character named Mr. Sekhoi who looks exactly like Yotsuya. This is the source of some fan speculation that they are the same person.
- Fake Brit: Yotsuya's accent in the Viz English dubs. To be fair, his first dub actor, Gerard Plunket is an Irish born Canadian. Ron Halder, his replacement post episode 36, however, is American but does a very seamless transition from his predecessor.
- Identical Grandson: He looks exactly like his grandfather, causing a bit of confusion when his likeness appears to show up in old photos, adding to the mystery who he is and what he does.
- Jerk Ass
- Only One Name: His given name is unknown.
- Porn Stash: Early in the series he was caught trying to leave a store with one until all the porno magazines were falling out of his coat though.
- Secret Agent: Highly suspected of being this.
- There Was a Door: One time used a log to break into Godai's room and spy on him.
- What, Exactly, Is His Job?
- Yakuza: Highly suspected of being this.
A boozy bar hostess who is usually known to lounge around wearing skimpy lingerie clothings while hanging around Ikkoku. She lives in Room 6 and works a short distance away in a bar named Cha-Cha Maru.
Hanae's son. He is a grade-school-aged brat, generally seen trying to get between his mother and her bottle.
Originally intending to move into an upscale establishment called "Rikkoku-kan", a typographical error on the lease papers brings him to Maison Ikkoku relatively late into the story as an accidental tenant. He led a relatively sheltered life before entering the story, and he moved into Maison Ikkoku as he started college against the wishes of his protective mother.
Godai's steady date and generally serves as an obstacle for him in his pursuit of Kyoko.
A high school student who develops a crush on Godai while he works as a student-teacher.
A classically demure Japanese maiden from a wealthy family. Her family and Shun's uncle have arranged a traditional Japanese marriage between her and Shun (against Shun's wishes).
- Arranged Marriage: With Mitaka.
- Babies Ever After: With Mitaka.
- Fragile Flower: She looks so pure and fragile that even Godai and Kyoko where shocked when they see her pregnant with Mitaka's children.
- Shown in a huge way when Shun tries to break off their engagement initially. She faints on the spot and when she wakes up she immediately cries, much to Mitaka's discomfort. Shown even more when she tries to join Mitaka's tennis club and meets her "rival" Kyoko. Even though she feels anguished inside she can't bring herself to be mean to Kyoko and is instead very awkwardly pleasant to her.
- Happily Married: To Mitaka.
- I Feel Angry: Never angers. When she knows about the existence of Kyoko, she just kindly tells her that she doesn't approve of Kyoko courting her fiancÚ.
- Mistaken for Pregnant: After a previous drunken night with Asuna and hearing "she" is pregnant, Mitaka assumes that he got Asuna pregnant, and vows to marry her to set things right. After he proposes and everything is set in stone, she reveals it's her dog who's pregnant.
- Na´ve Everygirl
- Yamato Nadeshiko
Kyoko's dog. He is a large and white Samoyed dog that was found as a stray by Soichiro Otonashi, Kyoko's late husband.
Akemi's boss. He tolerates Akemi's obvious incompetence as a waitress because his feelings for her are more than just that of a boss to an employee.
Kyoko's deceased husband and former high school teacher. Kyoko always spoke very highly of him.