Aside from the genetic modifications common among other residents of Sidonia, such as photosynthesis, the Honoka sisters also posses enhanced strength and accelerated maturation: the first series clones are chronologically five years old when the story begins, and the second series clones are only a year old when first introduced, yet they're all physically and mentally mature.
There are two series of eleven clones each, for a total of twenty two clones.
Honoka sisters
First series
Honoka En: eldest Honoka sister, trainee TS-203 and pilot 703.
