Here's more of the Knothole Village Freedom Fighters.

NICOLE
NICOLE is an advanced operating system created by Nate Morgan and uncle Chuck. Her main computer system is located in Sally's room in Knothole Village, with terminals throughout Knothole in key areas, including Rotor's lab, mission control, the farm, and the library. Sally also has a handheld device that is linked wirelessly to the main system. Most importantly, she's Sally's closest companion and has some degree of sentience.

Uncle Chuck
Charles Hedgehog is Sonic's uncle who created the Roboticizer and collaborated with Nate Morgan in creating NICOLE. He created the Roboticizer with the intention to enhance people's bodies and help them live longer, but full-roboticization had the effect of eliminating free will and erasing the memory of anyone subjected to it. The guilt of what he created caused him to abandon science, so he started a chilidog stand instead. During Robotnik's rise to power, he stole Chuck's designs for the Roboticizer to use for his nefarious technofascist goals. Once Robotnik took over, Chuck was among the many people who were forcefully roboticized to use as examples of the wonders of roboticization and all the good it will do. He was eventually able to regain his consciousness and memories thanks to the Freedom Fighters, and now works as their spy against Robotnik.

Nate Morgan
Nate Morgan is an advisor for the Freedom Fighters, Rotor's colleague and former teacher, and the founder of Knothole Village and the founder of Knothole Village and its ideology of equality, freedom, and classlessness (which the Freedom Fighters called "Morganism"). Decades ago while doing some field research in the Great Forest, Nate came across a massive seemingly-abandoned bunker built for the Acorn Royal Family in the event a revolution were to happen, which they ended up never using. When Robotnik had his coup, the Royals were all shoved off into the void to die (except Sally who escaped with Sonic), so this left Nate to do whatever he wanted with the Bunker he found, converting it into what would eventually become Knothole Village, where he'd take in escapees. The Freedom Fighters see him as a grandfather-like figure.

Knuckles the Echidna
Knuckles is a newer addition to the Freedom Fighters. He helps guard Knothole Village and is another heavy hitter alongside Bunnie. Once the guardian of Angel Isnald, which was ravaged by Robotnik, stripped of all its resources, and is now part of Oil Ocean Zone, Knuckles joined the Freedom Fighters in Knothole Village to help them put an end to Dr. Robotnik's endless expansion.

Miles "Tails" Prower
Tails is literally just a kid and his job is to help around Knothole and study. He's eager to learn new things, and is Rotor's apprentice as an engineer. He also had Antoine teach him how to fly a plane, Sally taught him how to use computers, and Bunnie and Sonic taught him fighting techniques. He sometimes sneaks out to help Bunnie, Sally, and Knuckles on missions. He wants to help them "find Sonic" and will never pass up an opportunity to help Rotor perfect the de-roboticizer since he (correctly) figures Sonic was roboticized.