Potentially only someone that would not solve the problem at hand. After all, Lumine is already in a relationship and quite clearly another woman.

{ and even if he compliments and flirts in his own way with lumine, he'd stop in a heartbeat if ayaka asked it of him. he would have with thoma as well, honestly. }

I don't know. That's why I asked them. Perhaps it would be easier if memories were just shared across both worlds, at least then one version of me could be happy even if it isn't me.