Timing this was harder than I thought…
Anyway, according to their manga profiles -
Happy Birthday Fubuki Tenjouin/Atticus Rhodes (10/31) and
Happy Birthday Ryo "Kaiser" Marufuji/Zane Truesdale (11/01)
I know GX is not very popular among the spinoffs, but if there is any reason to watch GX it's for these two! Trust me.
(
Links to character relevant episodes~ )