Panini is a cute young girl and is also one of the main characters in the series. She is an apprentice of Endive. She has a huge crush on Chowder and tries to get closer to him despite him not wanting to become more than friends.
Panini is a pink-furred cat-bear-rabbit. She usually has her ears tied like pigtails or a ponytail and has rose colored eyes. Her regular outfit is a sleeveless yellow dress with light green polka-dots and a light green heart in the middle of the dress. She has green shoes and a light green polka-dotted yellow hair band that she uses to tie her ears. Her appearance changes when she is angry to an extreme degree. During this time while she is in her "anger form", she resembles a cat more than a rabbit. She has black fur, her irises and nose are fuschia, and her sclera is green. Also during this time, her outfit resembles Chowder's.
Also stated by the creator in a blog post, she was going to be named Borlotti, have pointy ears and wear something with her face being the only thing not covered. Instead of being in love with Chowder, she would be a bully to him. C.H. Greenblatt described them like Tommy and Angelica Pickles from Rugrats.
However, the creator dropped the pointy ears idea as he felt it didn't fit with the drawing styles of Chowder, and he wasn't fond with that behavior as he thought he needed to make her more "sweeter and cuter". He then thought of a concept of Panini being in love with Chowder, since Chowder is not old enough to fall in love with females, according to Greenblatt, this aspect would frustrate Chowder "in a more fun way".
Panini is very loyal and obedient to Ms. Endive like a Shiba inu or a soulless robot who can't think independently for herself with no free will and often gets punished by her whenever she fails her, according to "The Apprentice Games". Panini always follows and obeys Ms. Endive's demands without question like a mindless drone without a soul or a will of her own, even if it means hurting Chowder.
Panini is also a good Sniffleball player. In one episode, Panini thought that she and Chowder had a Bluenana Baby. Panini also has a dark side, like when she violently forced Chowder to hold her hand and when she almost beat Gazpacho into a pulp though otherwise she is a happy and kind girl who hardly ever gets angry. She sometimes seems to dislike Gorgonzola due to his constant bullying of Chowder.
- Chowder's Girlfriend (debut)
- Burple Nurples
- Grubble Gum (cameo)
- Certifrycation Class
- A Taste of Marzipan
- The Moldy Touch (cameo)
- The Bruised Bluenana
- Chowder Loses His Hat (non-speaking cameo)
- Brain Grub (cameo)
- Shnitzel Quits
- Banned from the Stand
- The Apprentice Games
- Panini for President
- Chowder's Babysitter (voice only)
- The Fire Breather (cameo)
- Hey, Hey It's Knishmas!
- The BLT's
- The Dinner Theater
- The Brain Freeze
- Endive's Dirty Secret
- The Blackout (cameo)
- The Dice Cycle (cameo)
- Apprentice Appreciation Day
- A Faire to Remember
- Hands On a Big Mixer
- The Spookiest House in Marzipan
- The Apprentice Scouts
- A Little Bit of Pizzazz! (cameo)
- The Birthday Suits
- The Heist (voice only)
- The Prank
- Old Man Thyme
- Chowder Grows Up
- Panini is currently the only female cat-bunny-bear aside from Ambrosia.
- Panini resembles the Pokémon character Wigglytuff.
- Panini is more talented than Chowder in cooking as she managed to make her very own dish successful.
- Panini is named after a sweet bread pastry and grows up to be a pastry chef.
- However, Borlotti (which was supposed to be her original name) are beans.
- Panini is also named after an Italian pressed sandwich.
- Panini, like many of the characters in the main cast, has broken the fourth wall. As shown in Shnitzel Quits.
- Panini is shown to have a dislike for Gorgonzola because he picks on Chowder.
- Panini is younger than Ceviche.
- Chowder and Panini are friends as he does deeply care about her. However, Chowder doesn't want to have an intimate relationship and only wants to stay friends with her.
- This is ironic because Ceviche does the exact same thing to Panini.
- Despite having tall ears, Panini can fit them in small hats.
- Panini is able to fly by using her ears like helicopter blades, similar to Snoopy from Peanuts or Finder from Lilo & Stitch: The Series. Chowder refers to this as her "Copter mode".
- Panini stated she wanted 12 babies while Chowder, if he decided to settle down, would have one. When they marry, they end up with 50 children (in Chowder's nightmare). The reason for her to have some many children is because of her being part rabbit.
- Liliana Mumy (Panini's voice actor) also voices Roxy from Nickelodeon's Winx Club, Myrtle Edmund from Lilo & Stitch, Kimberly in Catscratch and Leni Loud from The Loud House in addition to her portrayal of Audrey Fremont in The Twilight Zone episode, It's Still a Good Life.
- When Panini goes berserk, she turns into a black cat with sharp claws such as in The Bruised Bluenana and attacked Gazpacho mercilessly. Also, in The Apprentice Games, Panini can be seen in cat mode.
- In Punch Time Explosion XL, she synergies with Hoss Delgado.
- Panini can be angry with Chowder like in Banned from the Stand where she forces Chowder to hold her hand. In Dinner Theater, she breaks up with Chowder (even though she and him didn't start yet) for saying she got killed.
- Panini knows Chowder is a dimwit but blinds herself to think otherwise.
- When Mung was in Chowder's body, he rejected Panini and she remarked that she may need a new obsession.
- Panini also has her own theme song played only when she and Chowder are alone.
- Panini resembles Anais Watterson, Gumball Watterson's 4 year old sister, from Cartoon Network's other animated show made in the UK, The Amazing World of Gumball.
- Lil Nas X's hip hop song Panini is named after Panini.
- In addition, in 2019, Lil Nas X made a music video and made her the main character in the video.
- Lil Nas X voices Shnitzel in the video.
- Her adult voice actor Grey DeIsle is noted for voicing Daphne Blake of Scooby-Doo, Major Dr. Ghastly from Evil con Carne, Sam Manson of Danny Phantom, Azula from Avatar: The Last Airbender, Wubbzy from Wow! Wow! Wubbzy and Mandy from the Grim Adventures of Billy and Mandy.
- She is very similar to Baati from Klung Klay and the White Tiger.