Stella is a construction worker on Sesame Street, who works with Biff and Sully during season 22. She is hired by Biff in Episode 2791 to help hang Mr. Handford's framed first dollar on the wall of Hooper's Store. Vocally, she is between the talkative Biff and the silent Sully, as she only ever speaks one word - "Yo!"
She appeared in the song "This Song is for the Birds" in Episode 2874 as a percussionist, drumming on Sully's helmet at certain moments in the song. Her musical talents are heard on the We Are All Earthlings and Silly Songs albums.