One who performs alone is a soloist.
Exorcist.
Solo
An esthetician or a skincare specialist typically performs facials.
An acrobat or a gymnast
flunky
The person who performs the ceremony is called the officiant.
"Shock Theater"
A person who performs postmortem examinations is called a forensic pathologist or a medical examiner. They are trained to investigate the cause of death by examining the deceased's body and conducting autopsies.
Leaps
The name of the person who performs surgery on the heart is a cardiovascualr surgeon. Here is a list of 15 hospitals with great cardiovascular programs.
Spinner dolphins are very acrobatic. They get their name because after they jump out of the water, they can spin around as many as 16 times on their tails before diving back into the water again. Besides spinning, they can also do somersaults and other exciting leaps in the air. Spinners sometimes travel in groups of up to 1,000 dolphins. People often watch spinners off the coast of Hawaii as they perform their amazing spins and leaps. Spinner dolphins can grow up to the length of five- eight feet and weigh up to 200 pounds.