SI/GMA-01 "SIGMA" Σ's Links
SIGMA holds concerns for Egon's health and well-being, having noted that the urchin doesn't maintain a proper diet and sleep cycle. However, after being told by Maddox numerous times, SIGMA came to the conclusion that it was better to leave Egon to his own devices unless he was in immediate danger. SIGMA considers Egon a close friend, especially after Egon was able to outsource a battery so that SIGMA could function more efficiently without being charged as often. When Maddox is unavailable, Egon is the first person that SIGMA will go to if he needs assistance with his hardware.
Knowing that SIGMA is one of a kind, Egon has always taken a big interest in the android and how he works. SIGMA's knowledge and durability has proven helpful to Egon time and time again, as the android often comes around to help Egon with dangerous and finicky experiments. With SIGMA's help, Egon has learned how to maintain and repair the android's hardware, and Egon's knowledge in nanotechnology has been quite helpful in allowing SIGMA to run more efficiently.
Spencer knows Sigma through his partner Maddox, working with them at the lab. Spencer thinks Sigma is fairly interesting, and is the first to put up his hand when Sigma was looking for a job for one of his clients.
Rider and Sigma had a brief encounter in which Sigma "blessed" Rider with full sentience which overloaded his hardware.
When Sigma first encountered Trance, he immediately offered to reverse the brainwashing that had been coded into Trance's software out of concern that the other android would be sent for decommissioning. Sigma often uses Trance as a "test dummy" for software updates, and it is Sigma's job to keep them both up to date.
Sigma's primary job is to assist Trance in reversing the octoling brainwashing that occurred to his systems. He also helps Trance assimilate into inkling society and gives him the opportunity to explore his interest in music in a more productive and safe way. Trance quite likes Sigma, and the two often get scolded by Maddox for talking in robot around everyone else. Hardware and firmware wise, the two androids are completely identical.