This one's a bit of a doozy to explain....
Now keep in mind, this_ISN'T_Sonic X, it's my HEADVERSE
War on Green Gate happens, many of the Seedrians escape the planet and try to find refuge on others. Earthia, Galaxina, and Cosmo find Mobius, which believe it or not, are_not_unfamiliar with aliens
They eventually make a home in Mobodoon (Sonic's kingdom) and live a peaceful life there.
Years go by, and by the time Cosmo is eighteen, she enrolls in community college, where Tails teaches and she ends up in one of his classes XD They get to know each other better, they date, they fall in love, he proposes, she accepts..... and then she gets killed.
Poor Cosmo.... I tend to kill her alot in my work, and I absolutely_adore_the girl o_o
In hindsight I probably should've added more Seedrians, because after my research for "The Metarex Saga", after watching the second to last episode, one of the Seedrians refer to Earthia as "their mother" so all the girls must have been born from Earthia (especially since apparently she's over 1,000 years old
) Gah, it's confusing...
I'mma just stick to mah headverse, mmkay?