Ruby could’ve been SO FUN. I love character’s whose importance comes not from themselves or their family but from the circumstances they find themselves in and the people they surround themselves with. Ruby being important and powerful because of the importance people put on her, because of how she met the doctor would’ve been interesting.
Making Ruby inherently entwined with Christmas because it’s the day she was born, because everyone says she is, making the music in her soul a famous Christmas song because everyone thinks that’s what it should be would’ve been interesting.
Ruby’s important coming from the doctor and her mom, and everyone else who has put that importance on her, would be interesting.
If they had worked that angle from the start. Don’t make her birth a mystery and if you do don’t hype it up so much, make her importance slowly gain traction throughout the story until she IS powerful and important, make something happen to make her so, make it happen because the doctor, this new face, so regretful of yaz not knowing anything about them(yes I found a way to work her into this) they infodump immediately, this new face that latches to the first person he sees, a blonde 19 year old, a 19 year old putting themselves in danger for others, vowing to change the past, to not hurt this one.
Make is happen because he begs the universe for the past to stop repeating and for once the universe allows it to. Let 15’s love and trauma influence how Ruby is perceived, let it influence the world around them to inflate her importance until it’s true. Let Ruby be in danger and for the doctor’s feelings, the regret and hurt and love and hope, influence the universe enough for Ruby to BECOME what everyone is saying she is.