A rock nurse appears in the episode "The Chamber of Frozen Blades." She works in the Rock Hospital (the presumed name of the building), and helped the Ice King get help for a sick Gunter. She speaks with an Asian accent.
She is a humanoid rock person who wears hospital equipment since she is a nurse. Her skin looks blue, unlike most rock people. She somewhat resembles the Coal Man. It looks like she wears a rock skirt with a shirt that can be seen due to the rocks that are used for sleeves.
And are you checking in as a patient or a cadaver?