I would have put it on the page, but I didn't want to make it too much of a Justifying Edit. But I just have to note: is Yugi really that much of a Karma Houdini? I mean, yeah, she did a lot of terrible things, but she did basically end up showing a desire to reform, and not only is she a child but she's also demonstrably not pure evil (Sakuya is an aspect of her personality after all), so killing her is out of the question. Really, what happens to her is pretty much the best punishment she could have had, being imprisoned again until she can sort herself out in her own mind (rather like what happened to Seto Kaiba in Yu Gi Oh). Of course, there's also the fact that Tenchi not killing the villain, even when he has some good reasons to want to, is meant to show something good about him. In any case, since we never actually see Yugi wake up, by the Tethercat Principle it's quite possible that she remained sleeping forever, which would make her not a Karma Houdini at all.