Wangji smiles at Tidus's enthusiasm. Whatever happens, it'll be more than he's done with his power since he got it.
"Thank you."

The commentary about the fake selves is accurate, Wangji cares even less about the person he had been- he had only just arrived on the train and then got thrown sideways.
"I never used mine, but I remember what it is."

He nods as they start the test, an unfamiliar tickle in the back of his mind. It's like someone knocking at door behind you while you're wearing headphones. He tries to bear in mind what Tidus said and then...

Pop! A freshly transported Tidus! Wangji blinks a little, righting them both as they collided just a little.
"How convenient."