User blog comment:IceFireWarden0/Speculations for Season 11/@comment-10990964-20130725182639/@comment-5259531-20130726004705

In Season 5, when Sister was being deployed to Blood Gulch, her ship came from Earth. So it only makes sense that Grif came from there also. As for the other characters, does it really matter? I heard once that Caboose was born on the moon or something crazy like that, but I'm not sure if that came from RT or not.