A rare character, the few appearances of Windows 3.1 have used a white 'mech-box' similar to that used by 98 and 98SE, piloted by a girl who appears to be DOS/V. Another version becoming more popular is a frail grey-haired young woman in a long frilly violet gown, with a "3.1" brooch on her collar. She is usually accompanied by either a black cat or a small black-haired catgirl in a nurse's outfit, both representing DOS.
DOS/V is a variant of MS-DOS designed with Japanese language support. She is about the same size as DOS but has long grey or grey-blue hair and a dark bodysuit. She is also a lot less shy.
A rarer character, MS-DOS is a cute but very shy little girl carrying around a keyboard and usually peeking around corners. The implication is that, like MS-DOS itself on non-NT versions of Windows, she is always lurking somewhere in the background, just out of sight.