Naoyuki Andō

Hiro's childhood friend. He acts as Ichiro's informant and assistant after he finds out the true nature of Hiro. He is a coward boy, proved by his inability to stand up for himself against the one who bullies him. Later on, he proved to be a valuable informant for Ichiro in his quest to save people and hunt Hiro down, even as far as teaching him the basic of how to control his mechanical body.

He's a big fan of Gantz manga series

Appearance
He appeared as a bland looking man that nobody really cared about. He also a very silent guy in school.