There's nothing wrong with more or less essence-less comments (I'm sure I sound like a complete retard quite often :D)! The best way is just to straight up tell them that (if) you find them interesting, that (if) you have something in common and that you'd like to be friends ♥

shdlfksjf this guy sounds so cool *_* Convert him >| Male JE fans always make me so happy! To the point I search the VS Arashi audience for them :)