Etekou

Kazuki's faithful petrobot whom he bought at the robot shop Haruka works at. Its forte lies in high mobility activities such as running or dancing.
Right after Kazuki has bought it, he alters his behavior from the generic "petrobot" patterns and custom tailor it toward being his "assistant". Thanks to this (unlike most of the other petrobots in game) Etekou is capable of pronouncing some very basic sentences. As with every robot related things, Kazuki is capable of controlling Etekou remotely via hacking.