In both iterations of the show, Boober is one of the five main characters, alongside Gobo, Wembley, Mokey, and Red.

He has an alter ego named Sidebottom, who represents the more extroverted side of Boober's personality.

[5] In Back to the Rock, it is revealed that Boober's baloobius (the tip of his tail) glows when he feels most at ease with himself, something that happens to other Fraggles as well.

Allegedly, his name came from an angry cow encountered by one of Jim Henson's daughters in Devon.

[7] According to an interview included in the Fraggle Rock: The Complete First Season DVD box set, Jerry Nelson originally wanted to play Boober, but Henson instead wanted Nelson to play Gobo, a role he would end up taking.