The following information comes from Nintendo Dream, which had an interview with Tetsuya Nomura...

- Raimu/Rhyme's character did not have any lines for her appearance in The World Ends With You
- they did voice casting for her character in Kingdom Hearts: Dream Drop Distance "out of consideration of the future of The World Ends With You series."
- "Regarding The World Ends With You, I can't say anything at present... (laughs). But there probably is something."