[4] In high school and college, she made comics about her life that she posted to LiveJournal,[6] which is how she met Pendleton Ward.

[5] Allegri also posted art of "Fionna the Human" and "Cake the Cat" online during the show's earliest seasons,[3] while working as a storyboard artist.

[9] Allegri created and produced her own animated short, Bee and PuppyCat, for Frederator Studios' YouTube channel Cartoon Hangover which was released on July 11, 2013.

[5][1][10] The episode introduces viewers to Bee, a recently unemployed young woman, and PuppyCat, a small and mysterious creature resembling both a dog and a cat.

Bee takes PuppyCat in and, in return, he helps her find strange temp work, in this case babysitting a giant fish named Wallace in Fishbowl Space.

[11] Natasha Allegri's successful campaign on Kickstarter has been seen as an example of digital-age crowdfunding mechanisms' role on enabling creators reliant on direct fan investment.

[2][5] Bee and Puppycat: Adventure Time with Fionna & Cake: Allegri has named several of her influences including works by Rumiko Takahashi, Sailor Moon,[5] InuYasha,[18] and Superbook,[4][5] as well as Bob's Burgers, King of the Hill,[19] Kiki's Delivery Service,[1] and her cat, Pancake.