Board Thread:Character Discussion/@comment-4786757-20141003092014

So as seen with Once, why is it that some shows give series regular billings to characters just being introduced as opposed to  characters that have been part of the supporting cast and have been "paying their dues". Like the Will Scarlett situation... I get why they did it and I love his character. However, couldn't they have promoted someone like Ariel, Mulan, Aurora? This doesn't apply to just Once, I'm saying in general... any ideas as to why this is done? 