Kenny Duncan is Kaz's gifted older brother. He gets along with Kaz, and is one of two of Kaz's siblings to know he has so-called "bionic" abilities, the other being Kyle. He is also a great doctor, as he is the only one at Davenaz Hospital who can actually cure who he thinks are bionic superhumans without causing strange symptoms. He is also very suspicious of Kaz.
- Just like how Kaz resembles his second cousin, Gabe, Kenny resembles his second cousin, PJ.
- Ironically, he is actually more serious and smarter than his cousin, being a prodigy. It is doctoring, not music or cooking, that he feels is his favorite past time.
- While everything about him is fanmade, he actually exists in the prime universe.