I don't think he should take her trying to force her will onto him here. I don't even feel like he does these things for the sake of power and the like, either, by marrying and stuff. Imo, I think he should decline. For starters this kinda goes against Megumi's own free will, to trade him around and force him into this political stuff. For second, Kiryu shouldn't really follow the elders will really and just do what he himself thinks is right. Those elders care far more about power here. Unlike Kiryu who's more of a moral character like Satoru.