The human cast has all joined a G.U.N. operation
Sonic the Hedgehog 2 introduced G.U.N., the Guardian Units of Nations military group that was founded to protect Earth from aliens like Sonic and his friends. The organization was revealed through an extended wedding subplot revealing Maddie’s sister Rachel was unknowingly getting married to an undercover agent. While she wasn’t thrilled, it seems like she and the rest of the human cast are shown working with G.U.N.
