It is really sad to see these lazy plot devices being used for the girls, but I don't think there's that big an age gap between them. It would have been much more creepy if it was with Kagura, who's much younger and frequently acts like a little kid. Although the whole "having a crush on an older guy" thing would have maybe made more sense coming from her.
I'm also pretty sure the whole "TQO" thing does just refer to ToQ-Oh. It didn't look like a zero and the fact none of the leaked sounds hint at a seventh ranger makes it seem unlikely, although not impossible.