Kaz Unnerstall

Kazimieras "Kaz" Unnerstall was a Mighty Med employee and is a main character in Lab Rats: Elite Force. He was born as a normo/human until a fight with Oliver's mom exposed him to the Arcturion, which gave him and Oliver superpowers. After Mighty Med gets destroyed, he teamed up with Breeand Chase (along with Oliver and Skylar) to track down both unknown super villains and those responsible for Mighty Med's destruction, and protect the world.

He was portrayed by Bradley Steven Perry.

Biography
Kaz, along with Oliver, was a comic book nerd who enjoyed reading about superheroes. Kaz and Oliver have been best friends since preschool, and they're always there for each other. Most likely to be voted as “class clown“, Kaz may be reckless and impulsive, but at the end of the day, he’ll always put friendship first.

An accident at a comic book shop led them to go to the hospital, which led them to discover Mighty Med (and thus superheroes) by accident. There he (along with Oliver) became the first normo employee at Mighty Med Hospital. It was there that they met Skylar Storm and other superheroes whom they befriended. He and Oliver restored Skylar's powers, and in doing so, they fought against The Annihilator, an evil mutant who stole Skylar's powers.

He and Oliver later discovered bionic superhumans, beings similar to superheroes and met Donald Davenport and the Lab Rats. He later came across Oliver's mother, also known as Mr. Terror, a ruthless villain who sought absolute power in a bid to rule the world. In a failed attempt to stop Oliver's mother, Kaz (along with Oliver) gained superpowers after absorbing the Arcturion's energy. He and Oliver used their new powers to defeat Bridget/Mr. Terror.

After defeating Mr. Terror, Kaz, Oliver and Skylar found out that Mighty Med was destroyed. They went to Davenport to help them track the villains. Soon after, reuniting with their friends Bree and Chase, they made the Elite Force.

After they defeated the villains, Kaz died while being on his phone while flying. Following that, Rhode Islanders Stewie and Brian Griffin take his place in the Elite Force. Kaz is only a main character in the series premiere.