>>99636152She was immediately liked by most of the cast, started up a romantic relationship with a main cast member, and held the power to stop the main bad guy.
However, outside of that, she couldn't really do much being fairly weak and meek, the hero was always the main character Sonic, and despite the aforementioned "power to stop the main bad guy" she had to die in order to do it. Not really a Mary Sue at all.
>>99636556Sonic's pretty /co/ related, but yeah, Sonic X's was originally only the anime.
So speaking of the comic, it's a shame it didn't last long enough to get to Cosmo, cause I think that arc was pretty good, even giving Chris some development, as much as people hate him. Having that in the comic would have been neat.