Frieza

"Oh, to see the Dragon Balls turn to stone at the very moment your wish might have come true. Quite a pill to swallow, eh, Vegeta? Of course, even more so for myself. As a matter of fact, in all my years, I have never been so angry as I am now. How incredibly irritating not to have seen the writing on the wall... now you pay! You vile, filth-sucking maggots! You will rue the day you crossed my path! Prepare yourself to face oblivion!"

- Frieza swearing vengeance upon his enemies. "Simian bastard... I am Lord Frieza. None surpass me! No one even comes close! Etch this into your skull; I am emperor of the universe! The likes of you are only fit to grovel at my feet! Or better still... to die in disgrace AT THE HANDS OF YOUR MASTER!"

- Frieza after his first defeat. Frieza is one of the main antagonists of the Dragon Ball franchise. He is the self-proclaimed "Emperor of the Universe" whose goal is to conquer the universe and achieve immortality. He is a powerful tyrant who was responsible for the destruction of Planet Vegeta and is the archenemy of the main protagonist, Son Goku. He also serves as the overarching antagonist of the entire franchise.

Frieza is voiced by Ryūsei Nakao who also does the voice for Caesar Clown.

Personality
Frieza is shown to have an extremely cruel and sadistic streak. He takes pleasure in seeing those that is below him suffer and is merciless to them. Frieza is known to be very arrogant and thinks that he is the strongest being in the universe. He looks down on other species in the universe like the saiyans and would state disparaging remarks about them. When fighting others, he is shown to be vicious by torturing his opponents and mocking them throughout the battle. While fighting against Goku, Frieza expressed fear when he fought against someone that could match his level of power. However when Goku chose to spare his life, Frieza repays his generosity by attempting to kill him during the battle showing that he is not willing to put aside the conflict. Since his battle with Goku, Frieza harbored contempt for Goku for beating him in battle and would go out of his way to want to kill him and destroy the Earth to get back at him.

When he was resurrected, he is shown to still be as sadistic as he was before and more dedicated to wanting to get vengeance on Goku and the Z fighters. Frieza is shown to have no care for his minions by how he would attack and murder them during the invasion of Earth. Before the Universe Tournament, Frieza attempts to make a deal with Universe 9 and openly express apathy over the idea that his home universe could be erased from existence. During the tournament, he was willing to work alongside his enemies to fight for Universe 7 staying in existence but still did not show any care for his enemies as comrades. When Whis revived him, Frieza was happy but admits that he will go back to doing what he did before showing no change in his character during the tournament. Frieza shows that he is only interested in himself and his own powers.

What Makes Him Pure Evil

 * Running an organization that wipes out entire species and sells their planets for profit. This places his body count high above those of most other villains in the Dragon Ball franchise (this is also accounting for all of the deaths he ordered), as well as makes him extremely heinous, even by the high standards of this particular series, to the extent that he can be considered one of the villains who sets it altogether. Even many villains that followed him weren't responsible for nearly as much universe-wide death, destruction and oppression.
 * Being the mastermind behind the destruction of Planet Vegeta and the genocide of the Saiyan race. This sets him apart from other villains, as he was responsible for destroying the world Goku and Vegeta originated from as well as the deaths of their parents.
 * While fighting his enemies, Frieza prefers to prolong their pain by brutally torturing them, as seen with Vegeta, Piccolo, Gohan and Goku. He also tortured Krillin after impaling him in his second form.
 * Terrorizing the inhabitants of Planet Namek whilst searching for their Dragon Balls. During his time on the planet, he was responsible for killing most of the planet's population. Worse, despite making a deal with one of the Elders that he would spare his village, he had his men kill them away. This includes Cargo who he killed personally in the manga.
 * Regularly killing his subordinates as seen in Dragon Ball Z: Resurrection 'F'  and Dragon Ball Super. Despite their loyalty to him, Frieza killed almost all of his men during the invasion of Earth when they lost to the Z-Fighters. Even after he started treating them better, he still killed one for calling him "short."
 * Immediately betraying Goku after being revived. Afterwards, he attempts to make a deal with Universe 9 in case Universe 7 does not win the tournament. While talking to the gods of Universe 9, he does not express any care for Universe 7 or anyone in the universe he is from if it is wiped from existence.
 * Even after helping Goku and Team Universe 7 win the Tournament of Power, he immediately reverted back to his old ways, as shown when he murdered Broly's father, Paragus, in order to have Broly unlock his "Legendary Super Saiyan" form and kill Goku and Vegeta for him. He then tries to murder Cheelai and Lemo after they betray him and use the Dragon Balls to save Broly from being killed by Gogeta.