Since this is a creative AU prompt rather than a canon event, I'll provide a to understanding, writing, or navigating this kind of story—whether you're a reader or a writer.
When Ellie wakes up, try to be friendly and welcoming. You could: ellie idol sister sleeps in your room while au full
This adds a layer of glamour and vulnerability. An "Idol" version of Ellie might be exhausted from a concert or practice, seeking a quiet place to hide from the spotlight. Since this is a creative AU prompt rather