I don't count myself as the smartest individual, but even I can see that her younger sister is indeed part of the dumbass faction.
"Hurr dee durr give commoners more money durr durr ruin prosperity for the entire kingdom hurr"
Three years since his death, So he reincarnated into the body of a nine year old? I know it sounds simple, but I'm used to stories of reincarnating at birth.