In the sequel to Sonic the Hedgehog, the speedster lost his world to a war between different animal tribes. The first film revealed how his owl guardian sent him off to another planet to stay safe, like Superman. The humans he’s met–Tom (James Marsden) and Maddie Wachowski (Tika Sumpter)–became his surrogate parents.
Sonic doesn’t have the chops for super heroics in the introduction. It’s easy to tell he (fondly voiced by Ben Schwartz) takes after the heroes from the comic books he reads, like the aforementioned crusader and The Flash from the DC universe. Alternatively, he’s even like Quicksilver in 20th Century Studios’ X-Men (prequel) cinematic universe. The visual reminders are needed since not everyone will remember the visual direction and story arc the first film sets up. This sequel takes place a few months after.
Commander Walters (Tom Butler) is back and the reason behind one of the subplots. All the key supporting characters return as they play a role in either Sonic’s well being or wanting to study his power.