E. R. Fightmaster

About

Emmett Rogers Fightmaster (born 8 June 1992), known professionally as E. R. Fightmaster, is an American actor, producer, and writer. Fightmaster is known for their work on Grey’s Anatomy as Dr. Kai Bartley, and through their solo music project Fightmaster (stylized in all caps) with their 2023 EP Violence.

Fightmaster grew up in Cincinnati, Ohio, attending the Seven Hills School. They then started college at the University of Cincinnati before moving to Chicago and earning a degree in women’s and gender studies from DePaul University.

Fightmaster is a former member of The Second City’s Chicago and touring companies. Their previous work includes performing with Boom Chicago, an English-language comedy troupe in Amsterdam. In 2020, Fightmaster was named a CBS creative and writing team member to lead the studio’s actors showcase, formerly known as the CBS Diversity Sketch Comedy Showcase.
Following a two-season stint on Hulu’s Shrill in 2021, Fightmaster was cast in a recurring role on Grey’s Anatomy as the show’s first non-binary doctor, Kai Bartley.
Fightmaster was cast in the 2025 film Sorry, Baby, playing Fran.