AKA “The White Violin”, AKA “Number Seven”
In season one she is a meek violinist with no apparent supernatural abilities, which somewhat alienated her from her siblings. In reality, she possesses the power to convert sound waves into destructive force, an ability her father suppressed with drugs to keep others out of danger.
This backfires. Her powers explode, the apocalypse happens, and she ends up in 1962 with no memory and another impending apocalypse. Of course she also finds love in a bored housewife, so it’s not all bad.