Ehehehehe. Well, um. Let's just say Ivan knows a sight more about sex than he will readily admit to knowing. I can just imagine him asking Hammet and Layana all these really embarrassing questions, in public, when he was, like, three, and they of course had no idea yet where he was coming up with them...

His favorite food is pickles. They're something of a hometown specialty where he's from. :3

I don't know that Naminé's had the chance to try other media, to be honest. I think she would enjoy them if she tried, although she would probably still concentrate on 2D art instead of 3D.

Demyx does have a favorite artist, but as he wasn't from Earth it's not anybody we've heard of. They were a folk/alternative band that Demyx's own folk/alternative band copied took a lot of style cues from. (Not surprisingly, most fans preferred the original.)