[Switchblade]

Yep. One of Inoue's favorite things to do on his shows is push heavy pathos and one of his very favorite gimmicks for that is the artist who loses their ability to perform. It was a big part of Faiz and it popped again in Kabuto and OOO. I wouldn't be surprised if there are other examples that I'm not aware of/forgetting, too. What makes the situation with Kengo different is that it is so directly similar to Kaido's story on Faiz. For me it's one of the most egregious examples of Kiva being a hodgepodge of reused plot lines from Inoue's older work.

Also, while Kengo has grown on me this time through, he will never hold a candle to how great Kaido is and it does him a real disservice to force the comparison.