Null

Null is a main character in the Null & Peta series. She is a genius in elementary school who built Peta (Robo) after her sister Peta died. Throughout the series, viewers can see that Null is quite rebellious, even for her age. She believes that due to her intelligence, she can distinguish between what’s right or wrong for her. She sets out to prove her point quite often. Besides that, she's quite cheerful and prides herself on her genius inventions.