User blog comment:B214/Volume 17 spoilers./@comment-1359322-20140222023323

As for those interested to know about Saji and Sona.

[Sona reacted the same way she did in volume 5. Being emotional and crying at how Saji used his body to proetct the school. Though it's not a romantic kind of emotion. Its similiar to how the Gremory was crying in volume 10 when Gasper kept on standing up.]

Once again, all spoiler are taken from n0m@n.