Although Zhuge Jin was not as brilliant in statecraft and military strategy as his more famous brother Zhuge Liang, he was known throughout his life for his virtuous character. He had a reputation for conducting himself with grace and decorum, and for being thoughtful, magnanimous and tactful. In return, he gained Sun Quan's trust, and Sun Quan never questioned his loyalty towards him. Zhuge Jin was also known for helping to mediate conflicts between Sun Quan and his subjects, including Zhu Zhi and Yu Fan.