There is no built in method to do it. If you are willing to write some Javascript you could do it though.
Your Angular code could add an object to the global scope which could be accessed from a C3 script. This global object should have functions to allow you to send what ever data you want to any given Angular component.
I can't really go in the details of how to do it, because I'm not familiar with Angular, but I imagine it should be possible.