A Song of Sea and Storm
Menner Meilander has served as Arch-Chancellor to the Sceptre ever since the former Arch-Chancellor, Percival Quillborn, went mad and was removed from the position.
It is Meilander’s job to read every book, know every law, every scrap of recorded knowledge he can fit into his brain, so as to advise the Emperor on any conceivable topic. Menner is good at his job, but Quillborn was more brilliant (if crazy).
Meilander was originally from Westeros, were he studied as a Maester in Oldtown. Some disgrace he will not mention drove him from his homeland to seek other employment.