Lihaku is a military official serving in the Outer Court of the imperial palace and a secondary character in The Apothecary Diaries. He is a young officer who possesses a well-trained, muscular physique and takes his duties as a soldier seriously. His personality is straightforward and earnest, yet he is unexpectedly soft-hearted, which sometimes contrasts with his imposing physical appearance. His physical strength and combat skills mark him as a rising star within the military hierarchy. Lihaku becomes acquainted with Maomao, the protagonist, and interacts with her primarily through his duties and his connections to the outer palace. His role in the story involves participating in significant military campaigns, such as the suppression of the rebel Loulan. His motivations are rooted in his sense of duty and his commitment to his role as a soldier. In terms of development, Lihaku is depicted as a capable and loyal officer whose straightforward nature and reliability make him a dependable figure within the court's military circles. His key relationships include his acquaintance with Maomao and his professional ties within the Outer Court. His notable abilities lie in his combat proficiency, physical strength, and disciplined military conduct.