Fortunately, no problem with him has occurred, either. (originally 幸い、そちらも特に問題は発生してないよ)

Probably it is... Because of that girl. (originally 恐らくそれは。。。あの彼女がいたからだ)

Just before Nito showed up, Iwakasa had already witnessed the presence of something that transcends the physical world. (originally にとが姿を現す直前に、岩笠はすでに世の理を超越した存在を目の当たりにしている)

Therefore... (originally それ故に)

Nito's figure, who disappeared in front of him, surely... (originally 目の前で姿を消したにとのことも、きっと)

...would be also recognized as a similar kind of evil spirit. (originally 同じ物の怪の類として認識したいとだろう)