Ma Su
Since the start, Liu Bei's chief advisor Zhuge Liang had been impressed by Ma Su's expansive knowledge in military strategy. At some point before 219, Ma Su was transferred to Yuexi, a troubled commandery in the south as his Administrator. Yuexi was home to numerous indigenous tribes, many of whom refused to accept Liu Bei’s authority. It was the site of a significant tribal revolt led by Gaodingyuan in 218. With help from Li Yan who bent Gaodingyuan in a battle in 218, Ma Su did well in keeping order in the commandery. However, before Liu Bei died in 223, he warned Zhuge Liang that Ma Su was not as talented as he seemed and should not be given important appointments. Still, Zhuge Liang did not heed the warning, and Ma Su was made a personal military consultant to Zhuge soon after Liu died. The two were very close and would often hold discussions from dawn to dusk.