Even though Sonic eventually settled down with Chuck, he's had a few flings that resulted in some kiddos. One of them being Sincelo, who is his child with his fanboy Spike. Due to Spike's devotion, Sonic made sure to visit Sincelo for every milestone and accomplishment, and he grew very fond of his blue dad. Sonic was the one who came up with his name, likening the light blue of his spines to icicles.
When Sincelo met Chuck and Gear, it was the latter's love of tinkering and habit of breaking that got him interested in repair.
As an adult, he helps the Midesta Defense Force by repairing weapons and gadgets, and he has gotten into a full relationship with Gear, regardless of the fact Sonic is Sincelo's biological dad and Gear's stepdad.
While he cannot run super fast, he has the ability to spin around like a tornado, similar to Sonia from Sonic Underground.
