Carpenter's television roles beyond Dexter include Rebecca Harris in the comedy drama series Limitless (2015–2016) and Erica Shephard in the drama series The Enemy Within (2019). Her film roles include Angela Vidal in the found footage horror film Quarantine (2008) and Sonya Blade in the direct-to-video Mortal Kombat films Scorpion's Revenge (2020) and Battle of the Realms (2021).
Carpenter was born in Louisville, Kentucky, the daughter of Catherine (née Mitchell) and Robert Carpenter. She attended St. Raphael the Archangel and then Sacred Heart Academy. She trained at the Walden Theatre Conservatory program, and later at New York City's Juilliard School (Drama Division Group 31: 1998–2002).
Before graduation, she was cast in the 2002 Broadway revival of Arthur Miller's The Crucible starring Liam Neeson and Laura Linney.