Definitely. Relena is one of the few characters who has a perspective that isn't majorly skewed (of the pilots, Quatre is the only one who, apart from the whole "I'm just a clone thing", seems to have a balanced outlook -- and he's the strategic vision/one who pulls the team together; then the others who don't seem to be considerably messed up in some way would be Sally, Noin and Cathy).

*nods* Treize is the sort of person who cultivates peoples' attention and then manipulates it, and flirting is definitely one way (out of many) to draw them to him. And that certainly sounds like something he would do; he always seemed to me to have some distaste, even, for the governmental politics (although that could just be more that he found the politicians themselves boring? xD).