Sun Deng
After Sun Quan declared himself emperor in 229 and designated Sun Deng as his crown prince, the four attendants were promoted to commandants under various titles. Gu Tan became Commandant Who Upholds Righteousness (輔正都尉) and continued playing a supporting role to Sun Deng. Among his four attendants, Sun Deng favoured and trusted Zhuge Ke and Gu Tan the most, and he regarded them more highly than others such as Fan Shen (范慎), Xie Jing (謝景) and Yang Hui (羊徽).