The Chancellor is right hand of the Grand Duke and is his replacement in time of need. The Chancellor is also the Chairman of the Grand Ducal Cabinet and House of Lords. Flandrensians can send their candidature for a position in the Cabinet, the Chancellor has the autonomy for the evaluations and to propose his Cabinet the Grand Duke for the official appointment.

Chancellor Joaquín Castillo-Lopez (2018 – current)

Chancellor Joaquin Castillo-Lopez is the first chancellor of the Grand Duchy Flandrensis, succeeding Hein of Giddis in 2018. He had previously served as Minister of Foreign Affairs from 2016 to 2018. He has also assisted the Grand Duchy of Flandrensis in updating its constitution on several occasions. In his responsibilities as chancellor, he is also the president on the House of Lords and chair its meetings whenever they are convened. In 2019, he served as Regent, temporarily assuming the powers and responsibilities of the Sovereign. In his free time, Chancellor Castillo enjoys archery, practicing martials arts, reading, writing, and cycling.

Under his leadership Flandrensis had 7 constitutional reforms and Flandrensis made an evolution from an association with non-profit activity into a registered non-profit organisation.