Quote from Aiko-San
Also, may I ask who you're referring to when you say that Sukitte Ii Nayo has such a character? I've read it but can't seem to know who you're talking about.
Spoiler (mouse over to view)
As I remember is a girl named Megumi, with a ponytail and bangs, not the Mei's friend and the one who was in love with Yamato. Something was said by her in Ch19, Pg30, about how Mei can appeal to people being plain; according to the translation: "But despite all of that, why weren't we chosen? Then this Tachibana Mei, who doesn't do anything, and is extremely plain looking, was chosen... Yamato-kun is 'different'? Girls who look pretty and are fashionable are better". Since she's in the friends group, I guess that's a hint of her envious-dissatisfied self, and a signal of another Yamato's fan coming. NOTE. It's been such a long time since I read the manga, and the scanlations aren't periodic, there's a possibility my mind is messed up.