Sashi Kobayashi
Sashi Kobayashi
Production Information
First episode: "North Pole Down"
Latest episode: "At the End of the Worlds"
Voiced by: Tania Gunadi
Character Information
Other names: Sash (by Penn and Boone)
Hot Potato (by Penn)
Species: Human
Gender: Female
Age: 13[1]
Occupation: Middleburg Central High student
Part-time sidekick (formerly)
Affiliations: Good
Residence: Kobayashi family's apartment, Middleburg
Relatives: Sylvester Kobayashi (father)
Tia Kobayashi (mother)
George Kobayashi (brother)
Friends: Penn Zero
Enemies: Rippen
Love interests: Teddy (formerly)
Blaze (formerly)
Penn (boyfriend)
Likes: Punching
Dislikes: Failing the mission
Being made fun of
Larry's Rants
Being lonely
Powers and abilities: Combat skills
Let's crunch some skulls!

–Sashi Kobayashi, "I'm Super!"

Sashi Kobayashi[2] (小林さし Kobayashi Sashi) is Penn Zero's best friend (later girlfriend), a student at Middleburg Central High, and a part-time sidekick. She is a Japanese girl that grew up in America after her family moved to the U.S.


Sashi is short with dark brown eyes and dark brown (or white) hair with violet and yellow highlights at the tips held back by two ponytails. For makeup, she wears purple eyeshadow. She wears her specs with light blue rims, maroon gloves, and a long-sleeved sky blue shirt with purple and blue lines at the wrist ends underneath a red-violet vest with a yellow circle on the left side of her chest.

She wears a red-violet miniskirt, different styled socks (her left sock a solid purple and her right sock with different shades of mauve stripes), and white boots with a purple line down the front and yellow circle on the sides. Around her left knee, there is a red-violet strap with a white circular object over her knee cap.

As of At the End of the Worlds, her hair is now short and straight, and has pink tipped ends.


Click here to view Sashi's forms in different dimensions.


Sashi is tough, levelheaded, and quick-witted. She is very serious and a no-nonsense kind of person, like with succeeding at the mission and defeating Rippen and Larry. She hates being made fun of or tricked. During missions, she's more than willing to threaten others and less likely to be caring for others' situations, especially the villains'. She's very aggressive, being very talented at hand-to-hand combat and many physical feats. Unlike her part-time partners, Sashi stays extremely focused, helping them to stay on track, and is not a fan of sillier things. At the same time, Sashi is understanding and compassionate, giving Penn considerate advice and sometimes warming up to others whom she isn't originally mindful of.


Penn Zero

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Sashi and Penn's kiss

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Penn and Sashi hugging in "The Last Mountain Beast".

Sashi is close friends with Penn. She isn't always happy with Penn's fun-loving and teasing behavior, and in "The Princess Most Fair", she complains that he talks instead of leaping into action. But they often are on the same page when it comes to defeating bad guys, both usually the ones to make plans and take the mission a bit more seriously. Not one for kinder tactics, Sashi doesn't always agree with Penn's kindness towards others, rather intent on the mission instead of the people involved in the dimension of the mission. She gives him advice if he needs it, is willing to trust his more sympathetic thoughts, and if he is in danger or needs assistance, she immediately tries to rescue him. She is shown to have a small crush on him, she usually punches him to avoid showing her affection. Whenever Penn is in deep trouble she's the one who shows the most concern. She is also shown to be jealous whenever other girls hit on Penn. For example, Orchid in the episode "Rootilda" and Pirate Maria in the episode " Mr. Rippen". In the episode, Save The Worlds, she yells out his name when she thought he sacrificed himself. In the episode, At the End of the Worlds, she becomes Penn's girlfriend after she kisses him at the ending of the episode.


Sashi is close friends with Boone. More often than with Penn, Sashi gets very irritated with Boone's goofiness, like when his ketchup painting ruins her specs before she can reveal the mission in "Brainzburgerz". In "The Princess Most Fair", she admits he and Penn annoy her and she says he is irresponsible. Shortly afterwards, she regrets it and apologizes, explaining that she meant it but she didn't intend to hurt him. However, she appreciates who he is, the ways he helps the team, and his friendship.

Sashi admits that she sometimes feels left out of Penn and Boone's close friendship, as she confesses in "The Princess Most Fair", but the two reassure her that she's very essential to the team, much to her happiness.


Sashi is not fond of Rippen, making sure to defeat him in any way possible. At school, she doesn't like him as her art teacher either.


When dealing with Larry, Sashi is very impatient with his talkative, naive nature. When Larry is in danger of being attacked by the skeleton army in "Hail Larry", Sashi is alright with him getting hurt, and as they travel through the cave, she questions how Rippen puts up with him.In Sensitivity Training


When dealing with Phyllis, Sashi can be surprised with Phyllis's actions, but she seems to like her. In "Temple of the Porcelain God", she is grateful for the pure gold crown Phyllis gives her and the boys for their most successful mission yet, saving she'll think of her when she sells it for cash.

Mr. Kobayashi and Mrs. Kobayashi

Sashi loves her parents, but because Phyllis tells her not to tell them about her job as part-time sidekick, Sashi lies to them that she works at Fish Stick on a Stick, as revealed in "Flurgle Burgle". Being left to watch her brother get congratulatory cakes for his accomplishments and not be able to say anything about her own, Sashi finds her only reward is succeeding at missions and being proud of herself, which drives her to take them very seriously. In "The Kobayashis".


  • For Sashi's art project in "The Princess Most Fair", she brings a smashed television.
  • Sashi's first name is an Indian name that means "moon," and her last name, Kobayashi, is a Japanese surname that means "small forest."
  • Sashi's musical tastes are a mystery.[3]
  • As revealed in "Flurgle Burgle", Sashi is the only one of the three main heroes whose parents aren't or were never part-time heroes themselves.
    • Also, she is the only out of the trio who has never changed part-time roles.
  • As revealed in "Totally Into Your Body", Sashi used to have a crush on an older student named Teddy.
  • In "The Ripple Effect", Sashi is shown carrying three stacks of dynamite in her backpack and a tranquilizer dart shooter.
  • It is revealed in "Zap One" that Sashi had done 13 years of sidekick training.
    • As this episode shows, Sashi used to be a bully, and she wasn't friends with Penn and Boone before their first mission.
  • You can see in "3 Big Problems", "Chicken or Fish?", and "Brainzburgerz" that Sashi is left-handed.
  • As revealed by Boone in "At the End of the Worlds", her middle name is Amanda. Making her full name, Sashi Amanda Kobayashi.
    • In the same episode, Sashi kisses Penn for the first time and they become a couple.


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