Null Peta  

Null & Peta, نول وبيتا, ぬるぺた, Null & Peta

A brilliant inventor named Null experiences great sadness after losing their older sister Peta in an unexpected accident. In order to cope with this loss, Null creates "Peta Robo," a machine designed to resemble their deceased sibling. However, despite having the same traits as Peta, the robot turns out to be slightly different from what Null had anticipated.