@Larrin023 on that note, about Ilay's portrayal not being consistent during the side stories... there might also be amother explanation. I've discussed it with heroine_addict, since Tae-ui is the main POV character, therefore, we only know the characters based on how Tae views them as. So, Ilay being this absolute villain in Passion is because in Tae-ui's eyes, he is the villain. And Ilay's more pronounced psychopathic side in DS and Suite Side Main story is because, despite Tae ackolwedging that he likes and loves Ilay, he still sees him as a Psychopathic madman, an unpredictable guy who kay suddenly change his mind and actually end up killing and eating him...
And it was only when Tae sees Ilay's vulnerability, saw how much Ilay was bothered after Ilay almost killed him, that for the first time in his life, this madman is actually scared and worrying... Tae's view of Ilay changed...
So that's why in the Suite Side Stories, we see a softer fluffier Ilay, bec that's how Tae views him now.