Kate Tsironis is the oldest child of Bob and Elizabeth and older sister of twins Teddy & Nicholas.

Appearance on Supernanny

According to Jo, Kate was socially mature for her age, but she would often be ignored by her parents because of her brothers.

She used to fake having foot cramps in order to get her parents' attention. One time during dinner Kate was upset about something. She then threw a fit and was crying because of the so called the foot cramps. Jo gave Kate a warning about timeout (Naughty Point) because she was not telling the truth, and then to let her know when she will spend time with mom and dad. Kate then calmed down.