They are not siblings by blood. So, having Chaser loving Iyana more than a sister is not a problem at all just like the Viridiscent of the Crown. The problem is, Chaser is more obsessed with Iyana than you think that he decided to lock Iyana in the prison and the original Iyana hated her family than anyone knows.
Not again! They made another short one. I thought this will be a longer like his dong (╯°Д °)╯╧╧
But I ate it well.