Zavok is a merciless and cruel being. He is very serious, ferocious,[8] brutal and dark, often deploying graphical threats of death and destruction, and he has little tolerance for failure. Power-hungry and ever focused on his goals, Zavok does not let anything stand in his way. Despite his intensiveness though, Zavok has occasionally displayed a sarcastic, dry sense of humor, such as when he sarcastically complimented Eggman as a "mighty conquerer".

For all his brutish intensiveness, Zavok keeps a calm demeanor and has a penchant for quick-thinking which makes him well-suited to leadership. Even as his temper flares up, he manages to keep his emotions in check. Zavok is likewise quite cunning and intelligent. Always observant, he studies his opponents in advance and knows how to use a situation to his advantage. He knew he would learn more about Sonic by letting Zazz fight him, regardless of the outcome, and quickly formulated a plan to use Tails to his advantage when his team accidentally caught him instead of Sonic. He is also manipulative, tricking Zeena into fighting Sonic with praise and compliments, and sending Sonic into disarray with psychological taunts.

Zavok comes off as very prideful. He disdains the idea of being in servitude to another being which can aggravate him to the point where he will speak up despite the danger present to him. Zavok's pride transcends into arrogance, which is shown in his mockery at Eggman for attempting to enslave him and the Zeti and at Sonic challenging him. He also has a bit of an ego in that he thinks he is better than everybody else, calling himself "the one Zeti" Sonic could not defeat even after losing to the hedgehog beforehand.

Like the other Deadly Six, Zavok is inherently malicious, sadistic and violent. He relishes in inflicting pain, torturing and killing others, telling Sonic how he would enjoy his screams and fear. He also finds joy in tormenting others psychologically, gleefully taunting Sonic with the losses of his friends. An omnicidal monster, he has no qualms about causing global genocide for his own gain or personal reasons, as he was perfectly content with destroying the Earth for the benefits of his team. Likewise, Zavok is very vengeful and will seize any opportunity for retribution; once Eggman had no means of controlling him, Zavok quickly sought to make him pay for his abuse, going as far to destroy his world to spite him, and plotted to turn Tails against Sonic after being humiliated by Sonic.

His personality takes a drastic turn in "Sonic X Dimensions", where after obtaining the element of Hope, he beings to see the folly of how he's lived his life prior, beginning to lose meaning in his role as a villain and ALMOST helps Sonic restore what they've destroyed.

Zavok is voiced by Travis Willingham, example of his acting can be found here: https://youtu.be/BGj3_MXeqLI?t=157