[Yuya leans closer to his radio, as if somehow that's going to clue him in on what's going on over there.]

Oh--that's right, you didn't see it. [It still fills his throat with disgust remembering it.] Yuzu, all of them... they're the same as us. They used to be Ray--Ray Akaba. The Professor's daughter.

He was trying to merge them together to bring her back. I don't know how the machine works, just that... it was his goal.