Hey Arnold boys promo art

The main boy characters. From left to right: Sid, Gerald, Stinky, Arnold, Harold, Eugene, Brainy

Hey Arnold girls with background

The main girl characters. From left to right: Sheena, Rhonda, Helga, Phoebe and Nadine


Arnold and his family

The Sunset Arms boarders and their families

  • Oskar Kokoshka, a whiny, lazy and self-centered immigrant from Czechoslovakia.
  • Suzie Kokoshka, Oskar's diligent, loving and patient wife.
    • Nancy and Baby Oskar, Suzie's cousin and her child (Nancy did not reside in the Sunset Arms and points out bitterly that Baby Oskar is NOT named after Kokoshka).
  • Ernie Potts, a short-statured (and tempered) demolition worker.
  • Mr. Hyunh, a quirky, sometimes odd immigrant from Vietnam, working in a Mexican restaurant.
    • Mai Hyunh, Mr. Hyunh's long lost daughter (never resided in Sunset Arms).
  • Mr. Smith, a mysterious person who never speaks to the rest of the boarders (in the first season only).
  • Lana Vail (in the first season only).
  • Mr. Purdy (in the first season only; voiced by Joseph Purdy himself).

For short time, the following people lived at the Sunset Arms: Gerald Johanssen ("Gerald Comes Over"), Rhonda Wellington Lloyd, Brooke Lloyd, Buckley Lloyd ("Rhonda Goes Broke"), Dino Spumoni and Don Reynolds ("Partners").

Arnold's classmates and their families

  • Helga G. Pataki, a domineering, intimidating and tomboyish bully who hides an intelligent and poetic side as well as an obsession with Arnold.
    • Robert "Big Bob" Pataki, Olga and Helga's rough, intimidating and sometimes neglectful father.
    • Miriam Pataki, Olga and Helga's drowsy and inattentive mother; she is an alcoholic who constantly passes out and sleeps around the house all day. 
    • Olga Pataki, Helga's ditzy, yet sweet and academically-gifted "perfect" big sister.
  • Gerald Johanssen. Arnold's cool, street-smart, and loyal best friend.
    • Martin Johanssen, Jamie O, Gerald and Timberly's father. While a cheap businessman he is a caring and sensible father.
    • Mrs. JohanssenJamie O, Gerald, and Timberly's mother, works as a cashier at the Corner Store. She is a kind, devoted mother.
    • Jamie O Johanssen, Gerald and Timberly's older brother; he loves to pick on Gerald.
    • Timberly Johanssen, Jamie O and Gerald's little sister; a brat who often uses deception and manipulation to get her way then breaks down into sob stories to get out of all blame (Arnold and Gerald end up being able to use the latter to their advantage in 'Chocolate Turtles'). 

Grandpa Phil was also was Arnold's classmate in the episode "Back to School".

Other students of PS 118 and their families

Workers of PS 118 and their families

Olga Pataki was Mr. Simmons's assistant in the episode "Student Teacher".

Other characters and their families


  • Abner, Arnold's pet pig. Was a gift from the Green-eyed People at Miles and Stella's wedding from a water basket. Phil first thought to cook Abner but Stella decided to keep the pig
  • Angel, Angel fish #2108 adopted by Eugene.
  • Big Caesar, the legendary giant fish that lives in City Pond
  • Chester, Arnold's carrier pigeon
  • Cupcake a.k.a. Thurston, stray kitten Harold was refusing to give back to its owner
  • Elbert, Eugene's imaginary pet hippo.
  • Glue Boy, racing mule bought by Ernie, Oskar, and Mr. Hyunh who thought that it was a horse Glue Boy's favorite song is "You Are My Sunshine".
  • Helga's parrot, who was bought by Big Bob, lived at Arnold's, and was eaten up by Phoebe's monitor lizard
  • Henry, Eugene's pet fish killed by Arnold with a yo-yo
  • Lock Jaw, an old, tired, graffiti-covered turtle that lived in the city Aquarium
  • Lurkey, Stinky's pet turkey, referred to as "Lurkey the Turkey", who came to an untimely fate when Stinky's family killed and ate him.
  • Monitor Lizard, Helga's unwelcome gift to Phoebe
  • Pinky, Billy's pet worm
  • Pooter (1924-1927), a dog that Grandpa Phil and Aunt Mitzi had when they were young, and whose death caused them to refuse to speak to each other for 71 years.
  • Snappy, Stinky's turtle who was used for an April Fool's Day prank
  • Sidney, Sid's pet frog


Trivia and facts

  • Oskar Kokoschka is also the name of an Austrian painter.
  • Ludwig and Wolfgang are the names of the two "bullies" in the show. The names come directly from arguably the two most famous composers of all time — Ludwig van Beethoven and Wolfgang Amadeus Mozart.
  • Gerald's last name is spelled "Johanssen", "Johanson", and "Johansson" in the show. Phoebe's and Stinky's last names have two variants: "Heyerdahl" / "Hyerdahl" and "Peterson" / "Petersen" respectively. Suzie Kokoshka's first name was also spelled "Susie", and Timberly's as "Timberley".
  • Fuzzy Slippers, Gerald's mysterious informant, never was seen in the show.

External links

Community content is available under CC-BY-SA unless otherwise noted.