User blog comment:Crimson and Darkness/Shin DxD 4 discussion/@comment-1359322-20200221144840/@comment-37560916-20200221174505

Personally,  I don't think that Ishibumi wrote off Sona; I think he just wants to give more development to her specials servants, and I think that he got something for Sona too. But I love the idea of a Spin-off about Saji and Sona, this is very interesting!