Micie Sun Mussemburg is a supporting character in Atelier Escha & Logy: Alchemists of the Dusk Sky. He is a fourteen-year-old boy with blonde hair and green eyes, standing 157 centimeters tall. He works as a young elite for Central City's Audit Bureau and is sent to the town of Colseit to inspect the local Branch Office. Micie is described as a brilliant prodigy in both literary and military arts, but he still lacks real-world experience. Despite his youth, he carries himself with a certain authority and does not take orders from anyone within the subdivision, preferring to rely on his own judgment and abilities. His role in the story is that of an inspector from the central government, which places him in a position to evaluate the work of the main characters. His motivations center on performing his duties competently and maintaining the standards expected of an elite agent. Because he is a supporting figure, his interactions with key characters are limited, though his presence brings an external perspective from the capital into the affairs of the Colseit branch. Over the course of the narrative, he does not undergo significant personal development, remaining a fixed representation of the central authority's oversight. His notable abilities stem from his training in literary and military disciplines, making him both intellectually sharp and physically capable, though his lack of experience sometimes limits his effectiveness in practical situations.