Them or the Rank

The world is taken over by Ranks.
At 18 birthdays everyone gets their powers and ranks.

All the high ranked people were appreciated while the lower ranks got slaved.

How did the eldest daughter survive her high rank parents, and their goals that were forced upon her?
What rank did she receive... that flipped her world upside down and forced her to go against the rank system.

With her partner in crime! Did they succeed??