R

R is an entity with god-like powers that enjoys collecting and experimenting with creatures.

He appears in Voyage to the Stars.

Appearance
R is dressed in all black. His outfit doesn't resemble anything made on Terra and is most likely something from his own civilization. He wears a shirt with a patterned high collar that also has gloves attached to it.

He also has matching black pants and boots.

Abilities and powers
R is seen to be capable of creating and doing almost anything, usually accompanied by a snap of his fingers, a flash of light and a whizzing noise.

He has been seen changing his outfit, creating physical objects out of nothing, teleporting himself and others, bringing back the dead and freezing lasers in mid-air.

He is also seen to be capable of knowing the future. However, he states he may get into trouble if he informs people of events too early.

Backstory
Not much is known about R except that there are others like him.

Trivia

 * R is similar to Q from Star Trek: The Next Generation in terms of his powers. However, his morals and motives are different.