Shadow trip

Sonic and his group of friends—specifically Amy, Tails, Knuckles, and Rouge—decided to take a break and go on a trip.
At the station, the group was just waiting for Rouge, but she had messaged them saying she would bring a "girlfriend" along.
Sonic was chatting with Tails, while the others were just doing their own thing and waiting for the train, when finally Rouge approached them. However, as it turned out, the "girlfriend" standing next to her was Shadow.