Cor Petit, also known as Piccolo or Piccolo Jr., is a fictional character from the anime Dragon Ball Z Kai. He is a Namekian, a humanoid extraterrestrial race characterized by green skin, pointed ears, and antennae. Cor Petit was born on Earth, emerging from an egg laid by his father, the demon king Satanas Cor Petit, moments before the king’s death at the hands of Son Goku. As the son and reincarnation of this evil entity, Cor Petit initially inherited his father’s demonic nature and a burning hatred for Goku, viewing him as his primary rival and target for revenge.

In terms of personality, Cor Petit is originally portrayed as cold, calculating, and deeply antagonistic. He is a stoic and strategic individual, often presented as more mature and spiritually attuned than his rival, Son Goku, frequently practicing meditation. Despite his evil origin, he possesses a calm and intelligent demeanor, preferring tactical planning over reckless action. As the series progresses, his character shifts significantly. This change is largely catalyzed by his bond with Son Gohan, the young son of Goku. Gohan is the first person to see Cor Petit not as a monster but as a friend, and in turn, Cor Petit becomes a surrogate father figure and mentor to the boy, culminating in a sacrificial act to protect him. This relationship is the cornerstone of his redemption, leading him to abandon his villainous goals and ultimately become a protective warrior for Earth, fully integrating into the group known as the Z-Warriors.

The central role of Cor Petit in the story is that of a redeemed antagonist turned crucial ally. His initial plan for global conquest is set aside as he faces greater threats alongside his former enemies. He is instrumental in the battle against the Saiyan Raditz, where he teams up with Goku and demonstrates his ruthless pragmatism by devising a plan that results in both Raditz's and Goku’s deaths. His motivations evolve from personal vengeance to a commitment to protect the Earth and his adopted student, Gohan. A key development is his eventual reunion with Kami-Sama, the benevolent creator of the Earth's Dragon Balls who was originally one being with Cor Petit's father. By re-merging with Kami, Cor Petit transcends his origins and unlocks his race's original, immense power, gaining a deeper understanding of the universe and a more profound sense of duty.

Cor Petit possesses a wide array of notable abilities common to his race. He has a powerful regenerative factor, allowing him to reattach or regrow lost limbs and recover from severe injuries. He can also communicate telepathically and, on rare occasions, physically enlarge his body size. His most famous and devastating technique is the Makanko Sappo, also known as the Special Beam Cannon. This attack involves concentrating energy into a sharp, spiraling beam fired from two fingers placed to his forehead, capable of piercing through almost any opponent, as demonstrated when he used it to kill both Raditz and Goku. Another powerful ability is the Cho Bakuretsumaha, a massive energy wave created by gathering power between his palms, which he used in a desperate attempt to stop the artificial human Cell. He also employs the Makosen, a deceptive two-stage energy blast. Through his strategic mind, martial arts skill, and unique powers, Cor Petit establishes himself as one of the most formidable and critically important warriors in the Dragon Ball Z Kai series.