Hmm, didn’t quite follow there. What does Rae already know? She knows Vi got a new scooter? That’s the only detail I can come up with, but I don’t see how that would explain her being angry.
Hmmmm…

Except Vi didn’t get a NEW scooter. She got exactly the same old one, just taken apart and put back together to turn into a robot. To outward appearances it should be the same. Therefore, the only thing Vi could be excited about would be to have found it can turn into a robot, who happens to be Rae.

Hmm, so the robot told her she was a copy of Rae? Or it’s just cool that the scooter can now transform? I’ll keep thinking, and unless something pops up, this sequel is next on my to-do list.