Buckethead's longtime companion and 'sassy decapitated head friend', Herbie sits on Buckethead's arm and says all the things that Buckethead himself can't say!
...although, he has a little more of an attitude that Buckethead would like most of the time, and appears to have a mind of his own on occasion. In all actuality, he's quite the saucy bastard of the severed head.