Чжао Гао
Qin Er Shi depended on eunuch Zhao Gao so much so that he acted as a puppet emperor, with the eunuch as puppeteer. Zhao Gao was made the Prime Minister of the Qin empire during Qin Er Shi's reign. His reign was cruel and brought much suffering to the people. From his reign onwards, the Qin empire slid to a decline.