We learned in April 2020 that another light novel series had gotten the nod for an anime adaptation with the announcement of How a Realist Hero Rebuilt the Kingdom.
The book series comes from writer Dojyomaru with illustrations by Fuyuyuki which began in 2016 and has thirteen volumes out.
O as Roroa Amidonia, Mugihito as Albert Elfrieden, Kikuko Inoue as Elisha Elfrieden, Tetsu Inada as Gaius Amidonia, and Kenji Nojima as Julius Amidonia.