Hakoniwa to Papillon

The genius scientist Alincia works for the government, researching combat robots in the confinement of a land called the "Hakoniwa." She passes away at the young age of 18, only to wake up the very next day, as the new baby Alincia who appears in Hakoniwa... Resurrected as a clone each time she dies, Alincia continues her war research, all the while keeping her true motives a secret...

(Source: Silent Manga Audition)