Kokichi Voice Lines: 
English: https://youtu.be/0TpbyUusWf8
Japanese: https://www.youtube.com/watch?v=Qh2tZ87z6lg

Kokichi's Personality:
Kokichi describes himself as an evil supreme leader, and often claims that this title is the reason behind many of his questionable actions as if he is expected to fulfill his role. He is an elusive and manipulative person who unabashedly tells lies and says whatever he's thinking. He is also strangely straightforward about his supposed evil nature, openly claiming to be a leader of a large secret society, admitting to being a liar, and saying he has done nothing but bad things. Among other things, his organization supposedly has covert agents in every country, control over all the mafias in the world, torture as a form of punishment, and Kokichi's defeated opponents apparently will get sent to Siberia. However, none of his claims have been confirmed, and the other students think he's either lying or delusional 

If you need more information please refer to his Wiki page

https://danganronpa.fandom.com/wiki/Kokichi_Oma