Ms. Shimizu is Hideki
's teacher. She dreams of teaching elementary children but was told not to by her husband. Shortly after she and her husaband
married, they bought a Persocom. Her husband paid so much attention to the Persocom that he forgot about Ms. Shimizu. Because
of this, Takako doesn't trust human men.
She and Shinbo have an affair and elope in the manga (Book 3). In the anime, Shinbo mentions that they eloped in Episode 16, when talking to Hideki.