Otomodachi Robo: Choco

is a Japanese light novel series written by Hitoma Iruma, with illustrations by loundraw. The series began publication on April 10, 2015 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
Protect the earth from giant creatures with humanoid weapons. In those days, I, Yuka Nagamori, met a "girl". robot. The girl introduced herself so. According to a doctor-like man by her side, she is named "Choco". Choco said he chose me as a "friend."

"Tomoka, I'll ask you one. What are your friends?"

You don't know. ...... No, wait. Then do I know what that means? In a sense, it's more unrealistic than a giant robot. A machine with the most beautiful eyes of any human being. This was my encounter with chocolate.