Tullece, a Saiyan deserter from Frieza’s army, leads the Turles Crusher Corps to conquer worlds using the parasitic Tree of Might, which drains planets to create power-boosting fruits. His physical similarity to Goku arises from their shared low-class Saiyan heritage, a trait noted in-universe as genetic rather than familial. After abandoning Frieza, he cultivates the Tree to amplify his strength, spiking his power from 19,000 to over 300,000—a surge enabling clashes with adversaries like Super Saiyan 3 Raditz and Super Saiyan God Super Saiyan Vegeta. His ambitions escalate through alliances with interdimensional scientist Fu and absorption of the Evil Aura, a corruptive force granting him the "Evil Saiyan" transformation, marked by heightened aggression and dark ki control. Within Fu’s Prison Planet experiments, Tullece confronts Goku and Vegeta, espousing a twisted Saiyan pride that rejects compassion as weakness. When Vegeta resists the Evil Aura’s corruption, Tullece begrudgingly acknowledges his rival’s resolve. This dynamic shifts further when he allies with Goku and Vegeta against the Crimson-Masked Saiyan, sacrificing himself to strike a decisive blow and pass a Dragon Ball—a pivot toward collective Saiyan survival over individual conquest. A manipulative tactician, Tullece forges fleeting partnerships with figures like Lord Slug and Bojack, exploiting their goals until interests diverge. He revives fallen subordinates such as Rasin and Lakasei via the Tree’s energy, repurposing their loyalty for his campaigns. Later, he enacts genocidal retribution against Frieza’s race, seizing their homeworld to establish a new Saiyan empire in the *Universe Creation Saga*. Ruthlessly pragmatic, he views subordinates as expendable and deploys psychological warfare, such as triggering Gohan’s Great Ape rampage to destabilize foes. Though he scorns Goku’s embrace of Earth and rejection of Saiyan brutality, he demonstrates tactical flexibility, temporarily cooperating with enemies or deferring to stronger allies like Fu to advance his goals. His ideology wavers only in death, as his final act prioritizes Saiyan unity over personal ambition.