When deciding whether to take on a role, Thomasin deeply considers what kind of character they are. More specifically, she looks for strong characters who take control of their stories.
"In the past, women have been portrayed as being pushovers or not as tough and gritty as we really are. I like to play roles where you get a sense of empowerment," she told the LA Times. "I think that's due to the kind of environment I grew up in where my mom has worked really hard and she is a really strong female character."