Luna Ackerman is the younger twin sister of Mikasa Ackerman. When they were both about 9 years old and living with their adoptive family, The Yeagers, they were split up when, the now called Colossal Titan, kicked a giant whole in the wall letting in titans.
While trying to escape to the boats, they were split apart by people rushing to get on. Mikasa safely got on the boat, but Luna couldn't make it. Helpless Luna just climbed a tree, in hope that someone would help her.
Then someone did...
Find out her new life story with a man that she had heard of, but never got the chance to meet.
I can tell you this...
It ain't pretty...