The series is hinting that Akira "Rei" Yamamoto, the Cosmo Zero pilot, is interested in Kodai. It may or may not be real, but a real or imagined love triangle will liven things up (that's why I like 'Macross'). I can't in the end, however, see anything but Kodai & Yuki - that's too famous to change.
hahaha! i see! certainly Rei seems to be interested in Kodai! and I think Rei is one of cute girls of YAMATO 2199. the most beautiful girl is Starsha! and most cute girl is Yuki, the next is Rei! but i think Rei will not be love triangle of Kodai and Yuki. Probably LOVE STORY is not important for YAMATO 2199.