User blog comment:Crimson and Darkness/Shin DxD 4 discussion/@comment-5384276-20200219201845/@comment-28884330-20200220180800

Ishibumi has never had anything relevant for most of his supporting cast. Only the ORC, Longinus wielders and the antagonists in turn ever get anything since quite a while ago. Just think of how even in the supposed "Le Fay volume", she did hardly anything.

With such past experience, it's natural that people judge it so that Ishibumi basically wrote Sona out.