Kat and Tamora Mitchell

In the Comics
Paige is changing the diaper of one of the twins when Phoebe calls her.

Tam accidentally caught the house on fire when she used her power for the first time. They figured out that it was Tam when she also burned a circle in the floor at Magic School. Kat used her powers for the first time slowing down the progress of a book as it fell. Piper told Paige that they believe the twins split her powers, Tam speeding up and Kat slowing down. Paige and Henry are discussing the possibility of binding Tam's powers until she is old enough to control them. Paige does not think it is necessary to bind Kat's powers.

When Paige and Prue messed up thier family magic Kat and Tamora's powers unbinded. Tamora created a ring of fire and Kat froze a beverage.

Kat and Tam are only seen in a photograph at the house.

Phoebe wondered if Parker would be nonmagical like her sister and cousins (including Kat and Tam) had become.

Volume 1
They did not speak in Volume 1.

Volume 2
They did not speak in Volume 2.

Volume 3
They did not speak in Volume 3.

Volume 5

 * "Strawberry Milkshakes?" - Charmed Assault

Trivia
Pat Shand said that Kat and Tam were just under three at the time of Charmed Assault.