M...aybe? I'm not sure! She's only really fallen in love with people older than her in canon. Though -- she believes that everyone may be in love with her and she'll blush anyway, so there's a small victory there.

Also hey, hey, she's only going to be chuuni (mostly) when she has to use her Persona. She has dignity to keep up! And yeah, that works! She doesn't go to look for her brother very often, but when he does, he's always being chased around by fans or underclassmen with flowers....

...brother is truly popular.