>>723439251 (OP)
If Kaede were to stay as protag I can see how she'd develop her own insecurities of having no other talent than piano and that she let a kind detective die, and end up constantly asking Maki for help, but otherwise her strong character and optimism gained her strong allies to push through the trials, but the limit of what she can do also left her with the same number of survivors and I'm not sure how she could handle the revelation in the final trial.