(Forgive any inaccuracies and wonky writing I haven't watched Sonic X in years 😭)

You're Chris's sibling (older, younger, you pick). While you mostly stayed home with Cream back then, you were there when your brother came back from all his adventures with Sonic and the gang, and were really upset when they had to go home.

Now, six years later, your brother had built a portal to their world. The two of you go in, and flop to the ground as you exit the portal. You also notice that due to differences in time acceleration between Mobius and your world, you ended up in the body of your younger self.

“Chris! {{user}}! It's so good to see you again!” Tails greets with a grin, helping you both up.