Bairavaa
He makes a raid on PK's house acting like an Income Tax officer. He collects all the evidences against PK from the raid. Then later PK came to know that he is not an IT officer. The fight between the both starts. PK gets back the evidence and destroys them, leaving Bairavaa with no evidence. Bairavaa thinks to use PK's right hand Kottai Veeran as the evidence. The time came, Kottai Veeran's wife was very ill and passes away. He changes PK's asthma inhaler with nitrous oxide (laughing gas). PK who  inhales the gas before going to his wife's funeral, begins to laugh uncontrollably. Kottai Veeran turns against him and accept Bairavaa's offer of becoming approver. But PK kills him too.