User blog comment:Xilinoc/Ch. 565 (Mangapanda is run by lazy barnacles)/@comment-24279073-20140123070855

So the main process of distributing Yhwach's soul is to touch the target. It is kind of like playing a game of tag. However in Ishida's case, he took a part of his majesty and so he is compelled to stay by their side. One thing is still bugging me. Assuming Ishida really joined the army to avenge his mother, how come it never occured to him that he might be compromised? I mean its YHWACH he is up against.