Light Yagami, a character from the anime "Death Note," manipulates his own emotions and those of others to achieve his goals by employing various tactics such as deception, manipulation, and intimidation. He often uses his intelligence and strategic thinking to control the emotions of those around him, either by pretending to be emotionally invested in certain situations or by exploiting their vulnerabilities. Additionally, Light is skilled at reading people and understanding their desires and motivations, which allows him to manipulate them effectively. Overall, Light's ability to understand and manipulate emotions plays a significant role in his quest for power and control in the series.