Come on. Of course this is miscast and inaccurate personalty-wise, but it's obvious the crossover was made because Satsuki has a blue color scheme and is a rival to Ryuko, two of the most profound traits of Ky and Sol, or any Red Oni-Blue Oni rivals, really. The result would be the same if, say, these two were cosplaying as the s-CRY-ed main characters, but that would still be awesome to see.