Ok So basically uh- Pepper was hired as a cash register girl and janitor at age 16, and basically, she is a minimum wage worker who is obsessed with playing pranks on Peppino and the other workers, so she basically a trickster who likes to give people death threats as a joke. In her past as a child, she had an abusive mother, so she went to live with her father, who wasn't as bad as her mom, but he ignored her ALOT, which resulted in her leaving home to live on her own in a small apartment at age 14. Since she left home at such a young age, she of course had to find a job. She first worked as a waitress, which that didn't go too well, considering that it was a 3-star restaurant, and she was overworked. Due to all the stress, she quit her job at age 15, and started to work for a rich man who had 3 kids. But obviously, she quit pretty quickly, considering she dislikes kids. But then about 8 months later, she finds Peppino's Pizza, she thought about not having a job for at least 16 years, (Continuing her lore)

But she ended up trying again and getting employed. She has decided to keep that job since she thought it was good, she got paid well, and she's not overworked. So yea, that's Pepper's lore