This is a lead role, and is one of the trio heavily featured in the series.

She is the caregiver to her friends and her schizophrenic single mother. The heart that kept the crew together until life pulled them apart. Deadpan queen, sarcastic, quiet, and socially awkward. She held a lot of anger and depression inside. Ferris never wanted to be a burden on anyone, and carried the weight of her mother's mental health alone. She was left behind when her friends left town, and she stayed put. 

Think of Lydia Deetz from Beetlejuice and Max from Life Is Strange.

I'm not looking for perfect lines, I'm searching for the voice of the character. We need two voices, one from her teens and one as an adult.