Harriet is Babs Bunny's unseen friend. Because she is unseen, it is unknown what kind of animal she is or what kind of school she attends. All that is known about her is that she is one of Babs Bunny's best friends.
Mentions on the Show
In Prom-ise Her Anything, Babs, who is impatiently waiting on Buster to ask her to the prom, talks to her while waiting for Buster. When Buster finally arrives and apologizes, Babs is in a lovestruck state, and tells her, "I'm sorry, the rabbit you have dialed has been disconnected." Harriet, in her only speaking appearance, tells Babs, "Hello? Hello? Are you there? Babs, I'm still on the phone here, it's Harriet!"
In the Acme Home Shopping Show episode segment, I Was a Teenage Bunnysitter, Babs talks to her when she arrives a Duncan Potter's burrow to babysit him. At the end of the episode, Babs is asleep while Duncan talks to her.
It is revealed in the Dating, Acme Acres Style episode segment, Buster's Guide to Dating, that Harriet thinks Buster is cute. Babs tells the viewers only to go out with guys your best friends thinks are cute.
In the Career Oppor-Toon-ities episode segment, Buster's Guide To Part-Time Jobs, Babs speaks to Harriet whilst trying to become President in the White House.
In Toons Take Over, Babs is speaking to Harriet and says, "I'll take anything Meg Ryan turns down".