Third's clutch escaped their home universe years ago, long before she, the youngest of them, was old enough to legally take a name and to stop having to risk herself to keep others alive. She's still too young for that, and the alternate version of herself that she lives with calls her "Kitten". First and Second, the other survivors in her clutch, live elsewhere. They've been delayed joining the Named so they won't leave her behind again...and they've been breaching the laws that Nameless are required to adhere to so they won't be liabilities. Now their home universe has caught up to them, and they'll have to pay the price.