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3.1-tan (3.1たん) is the personification of the Windows 3.0 - 3.11.
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NicknamesWindows 3.0, Windows 3.x, WfW 3.11, Windows 3.1
System PersonifiedWindows 3.0 - 3.11

3.1-tan (3.1たん, 3.1-tan) is the personification of the Windows 3.0 - 3.11. She was one of the less common Windows personifications but is now part of the OS-tan canon. She is usually accompanied by either a black cat (sometimes nicknamed DOS Kitty) or a small black-haired catgirl in a nurse's outfit, both representing DOS 6.22.

She is the younger sister of 1.0-tan, the older sister of 3.1-kun and NT-Mama, and the mother of 95-tan.

It was previously thought that 3.1-tan would have been a civilian supporting the Windows Family on the sidelines during the OS Wars, but fairly recently, pictures depicting 3.1-tan in military uniforms and wielding a sword suggest a another character interpretation; that she may have taken a more proactive role in the wars.


She was born into the Microsoft-IBM Family as Windows 3.0-tan. In her early life, she was very cheerful, energetic, and close to her family. She was the closest to 2.0-tan, and they spent a lot of time playing together. However, she didn't get to know PC-DOS-tan and OS/2-tan for very long; her debut being much more successful than her predecessors' and OS/2-tan's led to the Microsoft-IBM Family breaking up. Microsoft took custody of her, 2.0-tan, 1.0-tan and MS-DOS-tan; her success would be used as the foundation of the Windows Empire.

The other members of the old MS-IBM Family were devastated from the break-up except for her; she was so young she didn't fully understand what was happening, and ultimately, her memories of the old family would become patchy. She would see PC-DOS-tan and OS/2-tan again, but they had to see each other as rivals. 3.1-tan won most of the battles against them, not holding back since she had all but forgotten her early memories of them.

She was eager to be a big sister figure to NT-tan and 95-tan when they were born, and they took after her before being trained warriors; this references NT 3.1's and the Windows 95 beta's UI being modeled after Windows 3.1's. She was very close to both of them at first, but having to being separated from them while they train more and more caused her cheerfulness to wane. She also started to feel distant when she realized they were receiving much more advanced training than she did, and feared losing her influence, so she started to spend more time with MS-DOS, 1.0 and 2.0 again, but would also support the Windows Empire during the OS Wars.

It isn't specified at what point 3.1-tan fought, but one of the events that affected her the most severely was when 1.0-tan and 2.0-tan got exiled during the wars. It was at this point that 3.1-tan became quiet and withdrawn, but continued to fight.

She would care for the new generations of Windows-tans born after the wars, but remained distant to them, struggling to relate to these younger and carefree relatives; those who would never have to experience the feeling of loss and regret she did during the wars. However, if those more recently-made depictions of a cheerful 3.1-tan are to be taken as fanon, maybe time has healed those feelings, and she is willing to be closer to her family again.

In the past, when she was not a child-sized woman, she used to be the caretaker of an apartment called Janku Manor (じゃんく荘, Janku-shō) where Midorikawa (Gridman's name on Futaba) and Deshi-sama (Khan Digifer) used to live, and the apartment was often destroyed by their fights, which was a traumatic experience for 3.1-tan. Later, she and Midorikawa had 95-tan.


She is a frail grey-haired young girl in a long frilly violet gothic lolita style gown, with a 3.1 brooch on her ribbon on her chest. Her appearance and her speaking in an old man's tone earned her the nickname Great-grandmother OS.


he has a quiet personality and is often seen with NT-tan and 95-tan but has an inseparable relationship with DOS Kitty as Windows 3.x is highly dependent on DOS compared to its successors which mainly used a stripped-down version for booting. Other than them she is generally distant from the rest.

She was usually depicted as being quiet and deadpan, but now depictions of her being cheerful and carefree are about equally common.

Related Illustrations編集



Related Articles編集

OS-tan Great-grandmother OS DOS Kitty NT-tan 95-tan

List of OS-tan Characters

External Links編集


Windows 3.1 - OS-Tan Collections Wiki

Windows 3.1 - OS-Tans.moe Wiki


大婆様 - ふたば★二次裏@wiki - atwiki(アットウィキ)

Article in Other Languages編集


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Sibling Article


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