Jessie being a beauty pageant participant is a reference to two characters voiced by Grey Griffin from two series that Chris Savino worked on, Brianna Buttowski from Kick Buttowski: Suburban Daredevil and Lola Loud from The Loud House, although, unlike Brianna and Lola, Jessie is not a spoiled brat.
Jessie's relationship to Tommy is quite similar to Maurecia's affection towards Todd from Wayside and Ronnie Anne's affection towards Lincoln from The Loud House. She punches Tommy in an attempt to hide her affection.
Jessie's love for ice cream is similar to Maurecia from the Wayside School book series.
Jessica Prestonovich is similar in many ways to another fanmade character, Jessica McBadbat, such as the same first name, secret crush on Tommy Turner, their mother is Veronica, being best friends with Tammy Turner and having similar interests: beauty pageants for Jessica Prestonovich and sports for Jessica McBadbat.
According to the episode "A Rainy Dose of Magic", Jessie has astraphobia (fear of thunder and lightning).
Jessie is a huge fan of Darcie dolls (a spoof of Barbie dolls).