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Sodachi Oikura (老倉 育, Oikura Sodachi) is a third year student of Naoetsu Private High School and a childhood friend of Koyomi Araragi. Due to many unfortunate situations, she has a bitter personality and hates Koyomi with a burning passion.

Sodachi is the narrator of an arc in Orokamonogatari and the titular protagonist of three main arcs: Sodachi Riddle, Sodachi Lost, and Sodachi Fiasco, and of one minor arc: Sodachi Mirror.


Sodachi is a young female with long silver/grey hair, grey eyes and a pale complexion. She dresses in the typical Naoetsu Private High School uniform that Tsubasa Hanekawa and Hitagi Senjougahara also wear, and her hair into twintails. In Zoku Owarimonogatari, her Mirror World counterpart has shorter hair and is more cheerful.


While initially introduced as a fairly intimidating person, the younger Sodachi that Koyomi once knew had shown a warm personality with a calmer demeanor.

During her years in high school, she's described as a girl who looks at others as if appraising them. Sodachi is a student with a strong sense of competitiveness. This is mainly the reason behind her more popular nickname, much to her chagrin. She loves mathematics and describes them as beautiful. Because of Koyomi's results in math, Sodachi often looks at him with a strong, almost psychotic feeling of hatred.[1]


Sodachi was the president of a first-year class where both Hitagi and Koyomi also belonged to. At school, she wanted to be called as "Euler", but ends up getting the nickname "How Much", a pun on her surname (お幾ら, o-ikura) and a reference to her personality.[1]

Two years before the present time, Sodachi joined a study group before the year's final exams, and later achieved a score of 99/100, making her the second highest-scoring student in the class. However, the unusual results of the math exam among those who attended the group study and those who did not sowed doubts, causing Sodachi to hold a class meeting in order to determine the culprit who had leaked the questions for the exam. The class assembly itself was inconclusive, but Sodachi was pinned as the perpetrator through majority vote.[1]

Despite being experiencing such a fate, Sodachi was able to continue studying, but stayed at home during the two years that followed.[1]


Ougi Formula[]

Sodachi's story from two years before is revisited by Koyomi as he and Ougi Oshino are trapped in a classroom beside the audiovisual room in the third floor of Naoetsu Private High School's building. Here, Koyomi recalls Sodachi's hatred towards him, as well as the involvement of his former homeroom teacher, Komichi Tetsujou, in the incident.[1]

After Tetsujou's file for a maternity leave, Sodachi returns to school, where it is revealed that she, as a third-year student, was in the same section as Koyomi and Hitagi as before.[1]

Sodachi Riddle[]

On the same day where she returned to school, Sodachi reunites with Koyomi. However, their first meeting after the class assembly incident was met with Sodachi's worsened sentiments against him. In her hysterical rage, Sodachi stabs Koyomi's hand with a pen, forcing him to retreat, but this scene is witnessed by Hitagi, who stubbornly headed to the classroom after hearing from Tsubasa about Sodachi's return. Sodachi enters a short argument with Hitagi, ending with Sodachi knocked out by Hitagi's punch.[2]

Sodachi Lost[]

Oikura did not attend school for the next two days after her short scuffle with Hitagi. Tsubasa becomes concerned about various issues regarding Sodachi and agrees to accompany Koyomi to the government-funded apartment unit where Sodachi currently lives. In this encounter with her childhood friend, Sodachi exposes her current unstable mentality, as well as the circumstances revolving around her.

Sodachi Fiasco[]

Koyomi Reverse[]

Sodachi appears in the mirror world as a sister figure who is the opposite of the Sodachi in the real world, due to never experiencing any traumatic events. In this world, she was taken in by the Araragi family ten years ago and shares a bedroom with Koyomi. She still loves math, but is very cheerful and affectionate towards him. Despite her happiness with her current life, she admits to Koyomi that she feels like it is not real. Later, she is seen to be negatively affected by his presence due to him not being of the mirror world and spending the most time around her.

It is said by Ougi that Mirror Sodachi's characteristics were based on her regrets that she was unable to become closer to Koyomi before she left the town.

Nadeko Draw[]

Tsuzura Human[]

Taking place years after Sodachi Lost, she reunites for the fourth time with Koyomi as 23-year olds at Sodachi's workplace, the Town Hall. It is explained their third meeting in college was orchestrated by Tsubasa, and they reconcile making a study group together. At the instructions of his parents, Koyomi, through his sisters, invites Sodachi to live in the Araragi household once again, upsetting Hitagi to the point of breaking up with Koyomi. Sodachi put major effort into getting them back together, leaving the Araragi household and threatening the two of them with suicide if they didn't make up. This lead to a guilty Hitagi reconciling with Koyomi, and the three of them spending time together in a fun campus life. At a later date, Hitagi and Koyomi went through a second breakup, and due to the effort Sodachi put into mending their first breakup, she got the most angry about the separation. Due to this her relationship with Koyomi was damaged again and they did not speak throughout the rest of their college term, going separate ways after graduation

Back in the present time at the Town Hall, Sodachi is back to her bitter self, insulting Koyomi and wishing for his life to fall apart. Despite the venomous demeanor, she accepts his offer to have lunch together and they have a lengthy chat about their current life with lots of bickering, Sodachi mentioning that she bought her ruined childhood home, planning to renovate it and start her own family in it to paint over the bad memories she made there. After Koyomi talks about his current dilemma with Hitagi, Sodachi asks for his contact information to keep up to date with his relationship issues so she can smile again. After mentioning that she has no partner yet, Sodachi suggests a pact that if both her and Koyomi are single by the time they reach their thirties, they'll both strangle each other to death.


  • Sodachi's hair is mostly a darker brownish color in the light novels, while the anime adaptation depicts her with a silverish, white hair color.
  • Sodachi is one of the only major characters in the series that is not directly involved with oddities in any way. While most heroines use an oddity to cope with their issues, Sodachi blatantly puts all the blame on Koyomi.

Catchphrases / Running Gags[]

  • "I'm so embarassed, so embarassed! I WANT TO DIE! I WANT TO DISAPPEAR!!!"

Appears In[]




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Characters of the Monogatari Series
Araragi Family Koyomi AraragiKaren AraragiTsukihi AraragiAraragi Matriarch
Heroines Hitagi SenjougaharaMayoi HachikujiSuruga KanbaruNadeko SengokuTsubasa Hanekawa/Black HanekawaShinobu OshinoSodachi OikuraOugi Oshino
Oddity Specialists Meme OshinoDeishuu KaikiYozuru KagenuiYotsugi OnonokiIzuko GaenTadatsuru TeoriSeishirou Shishirui
Hearsay Police Department Zenka SuoNozomi KizashimaMitome SaisakiTsuzura Kouga
Vampire Hunters DramaturgyEpisodeGuillotine Cutter
Other Characters Hitagi's FatherHitagi's MotherTsunadeMayoi's FatherTooe GaenSuruga's FatherSuruga's GrandmotherNadeko's ParentsTsubasa's ParentsMizudoriRousokuzawaSeiu HigasaRouka NumachiSasayabuKomichi TetsujouDeathtopia Virtuoso Suicide-MasterTropicalesque Home-A-Wave Dog-Strings