Forty Namba
Aliases A.I. Program No. 40
Birth Date
Zodiac Sign
Blood Type
Residence Kobe Residence
Family Toeni Namba
Saati Namba
Occupation Student
Likes [[]]
Voiced by
First Appearance Chapter 26

Forty Namba (ナンバー フォーティ Nanbā Fōti) is the fortieth Artificial Intelligence program created by Hitoshi Kobe and the first he brought to life intentionally using the Reality Module.

Programmed using both C and Assembly, Forty is more powerful than Saati and Toeni combined, however, due to a programming error Forty possesses two personality modes, a proper clean-freak male personality and a mischievous, fun-loving female personality. With each personality initially unaware of the other's existence, Forty's personality instantly switches depending on whether she says "Boy" or "Girl".


Forty-kun, the boy personality, describes himself as a hard-line conservative who is not interested in Hitoshi's sex-based hobbies. An anal-retentive neat-freak, Forty-kun is a self-righteous good boy with a taste for the nicer things in life. All of these traits were Saati's choices, albeit she wanted them in a little sister.
Forty-chan, the girl personality, describes herself as sensual party girl with a taste for the wild side of things, even going so far as to seduce Hitoshi by using a Hyper Program Option to give herself a more mature body. These were Toeni's personality choices, albeit she wanted them in a younger brother.
Saati wanted a "nice little sister", and Toeni wanted a "naughty little brother"; they got a "naughty little sister" and a "nice little brother".


Wishing to have a new younger sibling, Saati and Toeni snuck a look at this new A.I. while it was still in creation. While the sisters agreed on the age that they wanted their sibling to be, 12, they argued about the gender and personality and pressed too many buttons at once. The end result was an A.I. that had two modes: a male personality and a female personality both within a female body.

Character DesignEdit

Due to Akamatsu's love of how Forty (girl)'s personality would "light up the page", many of her personality traits would be passed on to the Love Hina character Kaolla Su during the latter's creation.

Concept GalleryEdit



  • When Forty was trapped in a Dating Simulation and observed Sailor-man retrieving a box of tissues, she assumed it was for blowing her nose instead of masturbating.

Main Characters Hitoshi KobeSaati NambaToeni NambaForty NambaCynthia McDougalYayoi Kobe
Secondary Characters Kimika AsoMa-kunPeter 4Billy-GSpider ZeroKikuko KobeTakako MiyaharaYuko WatanabeMisako Takemoto
Minor Characters Mr TetsuNittaMakotoSaati's Cooking TeacherCon ArtistsXenobiaHitoshi's UnclePanty ThiefA.I. Program No. 1A.I. Program No. 5A.I. Program No. 6A.I. Program No. 10A.I. Program No. 13A.I. Program No. 28A.I. Program No. 29A.I. Program No. 30 BetaA.I. Program No. 30.1A.I. Program No. 31The PrinceSailor-manKenichi NakamuraSatooYuko's VirusMikiko MisakoMiyukiKayoMina OkashinaSayo IshiharaChitose YamazakiYuuzuu Namako
Groups Kobe Family
Animals/Pets CockroachMonkeysTanukiWhite DogPuppyBlack CatManta RayPoochie

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