Arbiter

He is a male adventurer who serves as the leader of the Flame Lance Mercenary Corps. In truth, he was originally the captain of the Felskeilo Knights. His work is diligent and dependable, but when he gets excited, he sometimes challenges Cayna to mock battles. When he made such a challenge, it is said that someone’s debuff had been cast on him by Kee; in the manga adaptation, it is explicitly shown to be the work of Lopus Harvey.