Martin's notable roles include:
- Trixie Tang, Nomi Malone and Staci in Total Drama.
- Sally Syrup and Sugar in Ed, Edd n Eddy.
- Nikki Wong, Emma in 6teen, Nina and Lily in Stoked.
- Tangle in My Little Pony: Friendship is Magic.
- Emily, Lily and Mrs. Anderson in Caillou.
- Lola Loud, Luan Loud and Lynn Loud in The Loud House and its spin-offs.
- Princess Sofia, Ivy and Mia in Sofia the First.
She has also worked as an ADR director for various animes and cartoons such as:
- Dragon Ball Z Kai.
- Hunter x Hunter.
- Little Witch Academia.
- Violet Evergarden.
- The Seven Deadly Sins.