Highly doubtful. Sylvia is like 14 and the opposite of Hazukashi desu or whatever. Leen is :|. Laylea is an expy of Leen that's prettier. Lara is like 15 and not even a dancer at first. He's not fond of Lalum...
Only one that's an unknown is Feena.
I can see why one would find it boring, actually. The characters aren't particularly deep, for one thing.
And this is coming from someone who adored all the games thus far.