Hit and Miss actress Crome will join the cast in its fourth series later this year.
"I suppose Jess says what she thinks and can see through people's bulls**t," Crome told CultBox.
"Because she's so straightforward, she gets frustrated when people aren't honest with her. She's a tough cookie, but she's quite vulnerable too."
Crome also revealed that she has been enjoying working in a comedic role having previously assumed that comedy was not her "strong point", and spoke highly of fellow Misfits cast members Nathan Stewart-Jarrett and Joseph Gilgun.
"Nathan and Joe have both been lovely," she added. "I didn't ever feel I had to try too hard with them because they've been so open and welcoming, as have the crew."