User blog comment:Jopjopjop/Volume 18 Spoilers/@comment-3965848-20150423091427/@comment-16281343-20150423093035

Timing is a bitch.

~I dunno if he was also affected but what Hauteclere primarily did is purify the Kusanagi Sword and liberate Masaomi from YnO's influence. While guarding against the slash of both Irina and Xenovia - an angel and a devil fighting alongside each other- Masaomi thought of he can also become an Angel. After that Issei saw an illusion of a woman that hugged Masaomi.