Start with Sadayo

Ren knew that he'd give Sadayo her memories back, so he decided to do something fun with her.

"I can tell you who you are," said Ren. Sadayo ran over to him.

"You can? Oh thank GOD!"

"Yeah," said Ren. "Your name is...um..."

He thought for a bit. He didn't want to go overly ridiculous with it. He still did have some respect for Sadayo, after all.

Then an idea struck him.

"You're name is...Rise Kujikawa," he said, thonking to an idol Ann had done some shoots with before.

"Okay," said Sadayo. "But beyond a name, who am I?"

"You're the country's biggest teen idol," Ren said. "You sing, do commercials, shoot photos."

Sadayo's eyes flashed with recognition. Since she had no memories to go off, she accepted what Ren was telling her with no arguments.