Kara no Kyoukai is a set of movies that shows the other side of magic, there are characters that was reference in Fate/Stay Night series which belongs to this series. This series is one of the best out there, as it was very well written and has some awesome characters arcs. Like Shiki and her split-personality who is also called SHIKI but rewritten in a different Kanji. She and her Boyfriend faces same enemy as the way they handle things were different. Like in the third entry, where he listens to Fujino's story told by his friend who focus himself on her and had many other friends of his to do the same and was told that he was been soft on him, and that he should kick his butt and let her get him. This was just one of the many strange things that happens in this series and it all lead back to one person.