Characters that were noob af but specifically groomed and are top level by the end

Linus was the only unknown picked in the first film - they knew he had talent but he had no real direction or any specific function until Danny brought him in. And that was to fill the role that Danny was meant to fill before being made and that they knew would happen yadeyadeya.

Point is they brought Linus in to train the next generation which the trilogy does brilliantly - the 11, 12 & 13 films do a great job of showing the slight changes of dynamic as things go on. By the end Linus is inferring from and contributing to the minimal word chats. They trained a new legend and he's on their level.