Bartley is the first non-binary character on the show and is played by E.R.
Fightmaster, who is also non-binary.
Hamilton, played by Peter Gallagher, was invested in the research since he was fighting Parkinson’s himself.

Shepherd and Bartley became friendly as they worked on the project together.
They soon began a romantic relationship.
Fightmaster says playing Dr. Kai Bartley is gratifying
E.R.

Fightmaster toldNBC Newsthat they are happy to be able to portray Kai as a nonbinary character.
I’m not alone in this life.
This experience is not 100 percent unique and isolated to me,'" they said.

“I don’t think that there’s something in the water.
I think that there’s [more] people on TV.”
Shepherd is a recovering alcoholic and single mother, while Bartley is married to their career as a neuroscientist.
“I feel so privileged to be a part of that storyline.”
People kind of saw chemistry there from the beginning and became huge champions of that relationship."
Similarly, fans were very happy when Shepherd became involved with Bartley and finally found happiness.