^ ahh, Risa is very friendly. She's the 2nd of only 2 of them to reply back to me on twitter, although I'm not sure why she did, as all she wrote was "thanks <3". But these lot all know how twitter works - they all use it a lot, and are forced to send out all these pretty much spam tweets everyday in addition to their own actual tweets. But, nevertheless. And yeah, the AP girls follow back most people (unless you have a protected account, although a few have requested to follow me there recently). And some will go around following idol fans, like you saw. They are allowed to reply to fans, but it's pretty rare that they will reply (or retweet or quote-retweet) fans. Some will favourite occasionally, but they aren't one of those groups who favourite every tweet that is tweeted to them.