- Her hair, teeth and nails can be safely touched and you will not be erased.
To me this implies you can't touch her skin without being erased.
She would quickly develop a phobia of being touched and would probably insist on wearing gloves and long body covering clothes. Imaging loose fitting grimey clothes of a homeless angsty teenager.
But this could also be a saving grace. If others wear gloves when touching her, they might not be erased.
This allows medical professionals to help treat her in emergency situations. And for her to interact with more people in a cold snowy winter environment. Everyone is bundled up and wearing gloves. It gives her a way of having somesort of relationships without constant fear that some new friend would touch her skin.
If you are going more comic book style, she may develop her clothing style into a skin-tight body costume.
She may also become more introverted (nothing wrong with that), and possibly rely on technology for communication. She might develop an isolationist lifestyle and live purely through internet profiles and chat rooms. I imagining hacker cliche. Looking for solutions to her problem online. "Hello" #wave
- By accidentally erasing her parents from existence, it also prevented her much loved little brother from ever being born.
I'd say that this means she finds out she is adopted. It will add a dynamic of not only grieving for her parents but hating them at the same time for keeping the truth from her. It gives her a direction to start searching out the root of the curse. Her biological parents might not be the cause of curse but something that happened to her during her short lifetime. Hopefully something in the new timelines records will show what happened.
Oh, and if they are not her biological parents and they are erased, that doesn't mean her history would have been erased. Ie what happened to baby her in this alternate timeline without those parents.
- There could be a double of her that is living happily with other adopted parents.
- she could actually find herself switched into a timeline where she has different adopted parents.
It gives her a way to still investigate her adoption, biological parents and whatever may have happened to her, without actually loosing all records of who she is.
I like the double option better than switching parents option, especially if the curse was laid on her after her birth. This way she can find out if the other her has the same curse. If the curse was laid after birth, she could end up in a timeline where the curse didn't happen (and if she is living a switched life, she would be stuck there).
In the double option, as far as I can tell there would only ever be 2 of her in a particular timeline. No multiple on multiple copies. If the other her also has this curse, they would be changing their own history and she and they wouldn't be transported into each other's new timelines.
Both options provide some amazing team-up storylines.
Good luck with this story.