“We Like It Here”
The plot of Sonic Runners is very basic. That doesn’t mean there isn’t anything of note however. Ever since Sonic Colors the Wisps have made continued appearances in various games like Sonic Lost World without any explanation. Not anymore.
While most of the Wisps followed the Mother Wisp back to Planet Wisp, some Wisps decided to stay behind as they liked Earth so much. They remember Sonic too and say that they will help him whenever he needs it.