User blog comment:Piyush Banerjee/Shin DxD 2 discussion/@comment-27083298-20181220204228/@comment-37165251-20181220225948

Ingvild can potentially influence Great Red and Ophis....but for the moment she can not (for one her Sacred Gear is sealed because her powers are unstable and for second she needs to become much stronger to influence the two Dragon Gods)

But for powering Up Issey it should be ok^^