Timi is a recurring character who appeared on Sesame Street from the mid-1970s through the early 1980s. She was a good friend of Linda's, who also is adept at sign language.
She appeared as early as Episode 0661, visiting Sesame Street with Linda and the Little Theatre of the Deaf.
She re-appeared in several episodes after, including Episode 1016, Episode 1064, Episode 1152, Episode 1672, Episode 1673, and Episode 1674.
She also appeared in a season 14 edition of "Ask Oscar," signing all of Telly and Oscar's dialogue.