So far the only people aside from Homurabi Shirogane has been non-indifferent to are Akira and Kou (even if I think that's mostly due to Kou being a natural at pushing buttons and pissing people off).

Also, do you by any chance remember in which chapter there was that image of Shirogane as a king? *can't find it at the moment* I badly need the reference to check something about the new chapter.