She will endeavor to be a good ward but I can't promise she won't continue to fulfill her role as damsel in distress now and again because that's kind of her schtick. It's just she can set people on fire or freeze them to a wall for being mean to her afterward, now, not that she will.

Naminé's got some trepidation about going into the area outside the city at all, so she'd definitely want some company and/or supervision, and lunch is a nice bonus too. You can bet she'll remember anything he teaches her because hello, memory witch, what is it good for if she can't use her own memories as a cheat sheet??

But now, see, both with the Bleeding Heart stuff is exactly what crossed my mind as well - it'd certainly make a lot of sense if she caught the mean heart bug from him, since that's kind of all the options at once. I'm not picky, personally, since it seems like it'd work regardless of the direction!