Going to the Ground

Iris Blake is the youngest Blake, she was only a few years younger than O, her older sister. Iris was born on the Ark, she got locked up along with her older sister because of the only one child rule.

Iris and her siblings knew something only they knew, Iris wasn't normal. She had black blood instead of red. it was easy to hide on the ark, but what if the trio gets sent down to the ground with the 100?
what would the grounders do once they find out one of the 100 has the blackblood of a commander? How will Bellamy protect his sisters as they face earths challanges?

Lexa x Oc
The story will most stay the same in the beginning as it is in the show, but it will mostly different in some parts.