It is believed that Milenna and Mandy have information on the Stein sisters’ genetic ‘parent’, the two girls being fairly unique in the sense that they weren’t birthed as much as ‘grown’ from the body of a k-girl the age of Milenna and Mandy. Who this k-girl was/is is so far not known (though, as said, it is believed that the two k-teachers have information regarding this matter).

Apart from their skin colouring, both Gilly and Sandy are two of the most human k-girls so far seen in the world, the only thing setting them apart from the everyday person (apart from their colour) being the hair growth on their chests, shins and lower arms. The ‘night-and-day’ personalities of the two girls have ensured a fairly strained relationship between them, and other k-girls have often been forced to step in when the two have collided over sometimes completely trivial matters.