Youko and Asahi appeared and talked in the McDonald chapter (ch. 5), with pretty much the same lines :ROFLMAO:, but right now I don't remember other cameos saying something
"And here comes the rival with a tactical arm-grab cleverly covered by the umbrella to simulate a kiss. Poor kouhai-chan is been played with by all other contestants"
Of course you're needed, Haruto. Char needs a heartfelt confrontation with her siblings fallen to darkness for her climax as a magical girl (to be solved with Talk no Jutsu, obviously)