Buffalo is Goat’s best friend.  He runs this site.

They met at Old Faithful and immediately hit it off.  They travelled together for a while and eventually decided to become roommates.  While Buffalo was content sitting around at home with his science experiments (including trying to restore a vintage Clone-A-Tron 3000 that he picked up at Goodwill), Goat became restless, so she decided to take off on a grand adventure.

Buffalo made her promise to send him postcards from her journey so that he’d never be lonely.

(And for the record, Buffalo is not a Buffalo buffalo.)