Liz Toomes-Allan is a composite character based on Liz Allan, who was created by writer Stan Lee and artist Steve Ditko, and Valeria Toomes, who was created by writer Robert Rodi and artist John Higgins.
Liz is a high school student at Midtown High and the daughter of Adrian Toomes and Doris Toomes. She is the captain of her school's academic decathlon, which her classmate, Peter Parker's, is also apart of. Liz and Peter develop an interest in each other and eventually, Peter asks her out as his date for the school homecoming, to which she agrees to. However, Peter discovers Liz's father is the supervillain Vulture. Peter, wishing to protect Liz from Adrian's criminal nature, is forced to leave Liz at the prom and go after Adrian himself, making Liz downtrodden. Thanks to Peter's efforts as Spider-Man, Adrian is arrested and sent to prison, which causes Liz and her mother to decide on moving to Oregon as Adrian didn't want them during his trial. While gathering her things from school, Liz expresses her dissatisfaction over what Peter did at the dance, but encourages him to move on and wishes him luck in his own endeavors.
After Mysterio exposed to the world that the real identity of Spider-Man is Peter Parker, Liz appears on the cover of People magazine saying that Peter is a liar and tells details about her past relationship with him. The magazine has her surname as "Allan", indicating that she changed her name at some point after the events of Homecoming.
Yet, after Doctor Strange casts his spell to save the multiverse, Liz most likely loses her memory of Spider-Man's real identity.
Despite not appearing in the Ultimate Spider-Man TV series, Liz appears in the series's tie-in comic book series. She appears in a small arc watching a football match alongside Mary Jane Watson, and becomes tearfully devastated when the mascot of Midtown High's football team goes missing.
Liz Allan is a recurring character on the show. This version is a student and class president at Midtown High School. In the episode "Screwball Live", she takes the alias of Screwball to pull pranks on corrupt businessmen and posts her actions online. However, she draws the attention of Spider-Man, Hammerhead, and Absorbing Man, though the hero is able to defeat the villains. Following this, Liz puts Screwball on "hiatus". In the five-part episode "Spider Island", Liz is mutated into a Man Spider before she is eventually cured by the Ultimate Spider-Man.
Liz Allan appears in the 2020 video game Marvel's Avengers as a Non-Playable character. She appears in the DLC story "With Great Power", on which she and Peter Parker apply for internships with A.I.M., only to learn that the company is torturing Inhumans to create weapons with help from Liz's family's company Allan Chemicals.
Trivia
Spider-Man is the third animated incarnation of Liz Allan after Spider-Man: The Animated Series and The Spectacular Spider-Man.
In Spider-Man: Homecoming Liz's last name is Toomes, but is changed to Allan by Spider-Man: No Way Home, as seen in a photo, implying she had to or wanted to change her name following her father's arrest.
