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Characters: My Life as a Teenage Robot

    Heroes 
XJ-9/Jenny Wakeman
"I want to have friends, and hang out like normal teenagers do! But who would want to hang out with a rusty hunk of metal like me?"

Voiced by: Janice Kawaye

The main protagonist and the "16-year-old robot" to which the title refers, a state-of-the-art sentient gynoid automaton created by Dr. Noreen Wakeman five years prior to the series, though she was designed as a 16-year-old girl. Though XJ-9 was designed to be Earth's protector, armed to the teeth with a wide range of weapons, devices, and transformations, she desires to live the life of a normal teenager and often makes this desire quite apparent to her friends and creator.

Brad Carbuckle
Voiced by: Chad Doreck

Jenny's best friend and next-door neighbor.

Tuck Carbuckle
Voiced by: Audrey Wasilewski, Jess Harnell

Brad's little brother.

Nora Wakeman
Voiced by: Candi Milo

An elderly spinster robotics scientist and the one who built XJ robots, who is often simply refers to as "Mother" or "Mom" by Jenny and her sisters.

Sheldon Lee/Silver Shell
Voiced by: Quinton Flynn

Jenny's self-proclaimed romantic admirer.

Jenny's "sisters" XJ-1 through XJ-8
Voiced by: Janice Kawaye (XJ-1), Kath Soucie (XJ-2, XJ-3, XJ-4 and XJ-5), Candi Milo (XJ-6), Audrey Wasilewski (XJ-7 and XJ-8)

XJ-9's prototypes and "sisters".

    Villains 
Queen Vexus
Voiced by: Eartha Kitt

The tyrannical queen of the Cluster who constantly tries to get Jenny to go with her to her homeworld of Cluster Prime through immoral means.

  • Arch-Enemy
  • Big Bad: Vexus is this for the entire show.
  • Determinator: Even after losing multiple times to Jenny even to the point of losing her status as Queen, she still insists on attacking Jenny any chance she gets.
  • Even Evil Has Loved Ones: Genuinely cares about her people. Jenny even exploits this at one point, telling her that if she doesn't surrender, she will destroy one of Vexus' mooks.
    Mook: Mama!
    Vexus: (horrified) My baby!
  • Evil Matriarch: Subverted. She may be evil and the Big Bad of the show, but she still loves Vega (almost to the point of being overprotective, even.)
  • God Save Us from the Queen!: Cluster Prime's residents are actually good-natured, but they are forced to obey Vexus or be destroyed.
  • Hellish Pupils
  • Ineffectual Sympathetic Villain: Starts off as a huge threat, but becomes an easily dispatched threat later on. This really gets hammered home, though, when she eventually loses her dictatorship over Cluster Prime.
  • Totally Radical: She would have blended in while she was destroying Jenny if she only realized that The Roaring Twenties was over for almost a century now.
  • Tsurime Eyes

Smytus

A large green robot from the Cluster who seems to have ties to its military division.

  • Broke Your Arm Punching Out Cthulhu: Even after he successfully takes over Earth with the Cluster, he winds up without a lower body. Krackus had to build him a few replacements out of trash.
  • I Just Want to Have Friends: Hinted at. He perks up quite a lot when he's complimented by the humans, and he has to remind his minions to laugh with him after he makes a short speech.
  • Ineffectual Sympathetic Villain: Shares this trope with Vexus and Krackus in Season 3.
  • Large Ham: When making his entrance.
  • Paper-Thin Disguise: He puts on a wig and tries to pass of as Smytlana, a Ukrainian supermodel, after his attempt to break into a fashion designer's private boutique goes awry because the secretary called him fat. After a short while of being complimented, he falls for the disguise himself.
  • Superhero Movie Villains Die: In the Big Damn Movie, Smytus' last resort is a self-destruct mechanism he had installed on his forearm.

Krackus

A senile, older robot who often bungles his experiments and forgets where he is all the time. His inventions almost never last for very long, but he's not one to give up easily.

Killgore
Voiced by: Tara Strong

A small, adorable wind up robot from a toyline, Killgore somehow manages to attain sentience and decides to fulfill its purpose as a villain by joining the cluster. Things don't always go as planned for him, however.

     Other Characters 
Vega
Voiced by: Thora Birch

A citizen of Cluster Prime who seems wholly nonconfrontational. She is Queen Vexus' daughter, and after the movie, the current Queen of the Cluster.

Misty
Voiced by: Audrey Wasilewski

An alien girl with superpowers who met Jenny as part of a team.