Kitty

Kitty has rosy fair skin, light pink in low pigtails, and light blue eyes. She wears a prep uniform like the other Perfection dolls. In some scenes, she wears a black bodysuit as a spy. Kitty is the leader of the Spy Girls, an elite squad of three dolls who work for Lou. Like the other Spy Girls, Kitty is a sassy and sarcastic doll. However, out of the three, she is the least sensitive as she doesn't feel bad about upsetting her friends. Kitty has also been shown to enjoy doing impressions of Lou, suggesting that she's less enamored of him than Lydia and Tuesday.

Lydia

Lydia has brown skin, purple hair in a low braided ponytail, and golden-brown eyes. She wears a prep uniform like the other Perfection dolls. In some scenes, she wears a black bodysuit as a spy. Lydia is shown to be sassy and yet the most caring of the other Spy Girls. However, where Kitty is bitingly sarcastic and Tuesday is ditzy, Lydia is more emotional, crying when she finds out that Kitty stole her earrings.

Tuesday

Tuesday has warm ivory skin, short light blue hair that reaches her neck, and light blue eyes. She wears a prep uniform like the other Perfection dolls. In some scenes, she wears a black bodysuit as a spy. Tuesday is an airheaded Perfection doll who acts as one of Lou's main three cronies where she spends much of her time trying to impress Lou, although it is clear that he is not interested in her. Like Kitty and Lydia, Tuesday can be very sassy, although she does also have a tendency to be forgetful and dumb.

Moxy

Moxy is a felt-covered pink doll that's naked with black eyes and eyelashes. She has seven teeth (3 on top, 4 on bottom) and a glob of hair on her head. She also has two rounded curls, 4 fingers on each hand, making 8 fingers on 2 hands, and shoe like feet, kinda like a build-a-bear toy. Moxy is the leader of the group. She has an insatiable curiosity, limitless confidence, and the unique ability to make others feel great about exactly who they are, but she's also looking for something more. Likewise, she is a determined optimist who is up to all the challenges she has to face to get to "the big world".

Mandy

Mandy is an African American doll who has magenta/purple hair in a high bun and brown eyes (gold, Hazel or burnt orange, depending on the lighting). She wears a black vest with two gold buttons over a white collared shirt with a blue tie, a violet plaid skirt, white knee-high socks, and black high heels. Likewise, Mandy dons' thick circular black glasses. She has lipstick on her lips and a normal perfect doll body. Mandy is an insecure doll who hangs out with the Spy Girls in order to fit in. Still, Mandy finds it difficult to be mean to flawed dolls the way the others so easily do, since she herself isn't perfect. She has poor eyesight, which she hides from everyone, especially Lou.