Hey there @solucan03! Welcome to the community! It seems as though you’re trying to do one keyboard local multiplayer, and this changes a few things. First, I’ll warn you that not all user’s keyboards are capable of hitting more than a couple keys per key bracket, and could cause problems for your game. That said most modern systems can, so that may not be a deal breaker.
As scout mentioned, you’ll need to either to have the main character controller handle the BP that holds both actors though this can be messy depending, or you’ll need to send the inputs over to the other character as a sort of puppet. Functionally they accomplish the same thing.