Inatsuki Nanami

Japanese name:

稲月 ななみ

A strange and young girl found on the Aries Station. She is later found out to be a creation of Sukyura cells and human cells; basically a result of when Shuhei and Nao consummated their relationship (In a way, she is their "child"). She calls Shuhei, her 'father', and Nao, her 'mother'. SpoilerIn the end, she became the one that destroyed Cellaria, as she was the only who can counter Cellaria's ability to spread Sukyura cells.

Voiced by: Maki Izumi (PC), Natsumi Yanase (anime & PS2)

Wikipedia