Sari Sumdac

Sari Sumdac is technorganic robotic daughter of robotics genius, Dr. Issac Sumdac. She spends all her time in her father's laboratories. She hangs out with the Autobots, including her closest friend, Bumblebee and she is voiced by Tara Strong.

Seasons 1 and 2 of the series were highly prominent of her, but starting from Season 3 she was mostly absent. In Seasons 1 and 2, Sari as an adolescent child was much more into exploiting her key (which absorbed the AllSpark power) and sweets (marshmallows, chocolate, candy, etc.) rather than helping out the Autobots on their task at hand. While Bumblebee and Bulkhead were personally laid-back and therefore obeyed Sari's every whim, it was becoming clear that she was being irresponsible with her key, draining it of valuable power just so she can unlock electronically-locked doors, empty out candy vending machines, and turn on music players. She was ever confident that she can handle the Decepticons as while ironically even the Autobots who were much bigger and stronger than her could only panic if Decepticons ever appeared.

Later on in Season 3, it turns out that she is really a robot infused with human biology, thus a cyborg. This outrages Sari and she loses faith in her father Issac as well as Optimus Prime (who was only trying to get Sari to love her father again). During a confrontation with Headmaster, she then came to accept her biological identity due to her powers being capable of helping out Autobots against threats such as the Headmaster and a rocky turtle-like alien. She also loses the key, having absorbed all the power inside it to upgrade herself, earning an exo-suit, a hammer, and even advanced through age. She no longer is the once immature girl back earlier in the series and is now thoroughly much more mature.

Season 4 was supposed to have focused on Sari's origins more, but the series has been cancelled.