Lucille Ernella is a supporting character in Atelier Escha & Logy: Alchemists of the Dusk Sky. Lucille is a new government official educated in medicine, sent to the development project from Central. She is a junior to Escha and Logy within the development team, and address them both with the "senpai" honorific. She is serious about her work, polite, and nice, but sometimes she makes big mistakes. Escha is like an older sister to her, and it's easy for them to talk to each other. She is nice to Logy as well, but when she relied on Logy a lot, Escha became jealous.