User blog comment:B214/Volume 17 spoilers./@comment-16281343-20140220233157/@comment-16281343-20140221025815

There's a lot of questions about that but unfortunately, we don't know why.

Although we might get new images from Volumes 8, 13, and 15. They are included in Miyama-Zero's artbook. The image of Dulio is from there too.