Zazz is a nasty, cruel and ruthless Zeti with an unpredictable personality which is both his greatest strength and weakness. The meanest and most psychopathic of his entire race, he is every bit the metalhead he looks like and is wild and unruly to the point where he comes off as rather feral.[3] In addition to giving constant yells, he always wears a very wild expression and attacks with equal savagery. He likewise walks around with erratic body movements and even twitches occasionally. He is heedless to manners and social customs, having no trouble getting extremely close to the face of others, giving rude comments and shows complete disinterest when being scolded. His insanity makes him almost fearless as he rarely shows a single sign of distress. Because of his unpredictability however, it can be easy to turn the tables on him.

Zazz loves to fight and enjoys running wild more than eating three meals a day; holding him back from a fight will sent him flying into a rage. Hating boredom above all else, Zazz is always ready for a fight, even before he knows what he will be fighting, and will pursue his enemies with relentless determination and attack with powerful strikes. Another trait of Zazz is his short temper and hot-headedness; he hates when people show him disrespect and just a few snarky comments or oppositions are enough to send him into a furious frenzy.

Like the other members of the Deadly Six, Zazz is inherently malicious, sadistic and violent. He has an extreme appetite for violence and destruction, even by Deadly Six standards due to his unpredictable and unruly personality, and he relishes in the prospect of carnage and destruction, wildly eager and joyous about killing others by dismembering them. He also has a macabre sense of humor, laughin at how Sonic and his allies would die from the Extractor. In line with his thirst for bloodshed, Zazz is an omnicidal monster, having no qualms about causing global genocide for his own gain. He is also vengeful, given that once he was freed from Eggman's enslavement, Zazz launched an attack on the scientist, and wanted to get back at Sonic after he defeated him.

His personality takes a drastic turn in "Sonic X Dimensions", where after obtaining the element of Tranquility, he beings to see the folly of how he's lived his life prior, beginning to regain his composure and refuse to fight.

He is voiced by Liam'O Brien, example of his acting can be found here: https://youtu.be/BGj3_MXeqLI?t=226