I went with Rui and Nanba, although the Hana Kimi cast was harder, the only ones I couldn't really see making deals being Kayashima and (tentatively) Mizuki. Admittedly I don't know the HanaDan cast as well but Rui seems to fit more with that the others. At least for me; Tsukasa I can't see making a deal seeing as he's so... self-assured? *shrugs* Just my two pennies, for what it's worth. :)