Reinrassig III

Reinrassic III (voiced by Richard McGonagle) is a Highbreed, also called 'Reiny' by Ben. Ben was forced to work with while trapped on the desert planet Turrawaste in "Alone Together". During a fight with him, Kevin damaged the teleporter Reinrassic attempted to escape through, sending Ben and Reinrassic to Turrawaste which is used as a routing station. Though they needed each other to survive, indeed saving each other on multiple occasions, Reinrassic showed the typical Highbreed hatred of lesser species, forcing Ben to walk ten paces behind him and insulting him constantly. Reinrassic eventually lost his hand saving Ben from a native life form, resulting in Ben reattaching it as Swampfire. Eventually they made it to the teleporter but due to him forming a friendship with Ben, he banishes himself to Turrawaste, believing himself tainted by him.

He returns briefly but importantly in "War of the Worlds" Pt. 2, after Ben heals the genetic damage in all Highbreed by fusing them with alien DNA. He was unaffected by this because of his healing from Swampfire, as the vine used to reattach his arm has now spread up to his elbow and changed his DNA as well. He, despite his original self-imposed exile, realized that the Highbreed's views on other races were wrong and that being fused with another alien's DNA wasn't a curse, but rather allowed the Highbreed to survive. This caused the Highbreed Council to elect him as the new Highbreed Supreme, the leader of all the Highbreed. He called off the invasion and shook Ben's hand in a show of respect.

n of "Ben 10: Race Against Time," a pop-up bubble mentioned that he had thwarted Eon's attempts to get to Ben prior to the events of the movie.

Julie Yamamoto' (voiced by Vyvan Pham) is introduced in Ben 10: Alien Force as Ben's love interest. Her first appearance is in the first episode, where Julie congratulates Ben on his soccer win, sparking Ben's feelings. Julie later plays a bigger role in "Pier Pressure", where Ben manages to ask her out on a date (with help from Gwen). Their romantic evening at the pier is interrupted by Ship, who kidnaps Julie to get Ben to help him. Ben accidentally reveals his secret to Julie during the rescue attempt. Julie is quite accepting of Ben's Omnitrix-fueled exploits. Besides being good at tennis, she also is good in school and tutors Ben as seen in "Good Copy, Bad Copy" (although in the end Ben got away with a C+). It's revealed in "Pet Project" that she is keeping Ship as a pet. In the same episode, Julie showed some fighting ability, comparing a weapon she acquired to a tennis racket.

She helps out Ben in "War of the Worlds". Ben was reluctant to let her help, but her control over Ship allowed her to join the fight.