User blog comment:Jopjopjop/Volume 18 Spoilers/@comment-98.227.238.52-20150118021322/@comment-16281343-20150118043314

Both sides doesn't want to break the status quo. Yaegeki being an exorcists and Kureria being a High-class Devil.

They tried to break them up, persuaded them but to no avail.

~Irina's father is Yaegeki's superior. The killing is the reason why Irina and her family were forced to leave Japan.