Relatability can make a character the best too. If readers can see parts of themselves in a character in a short story, whether it's their dreams, fears, or struggles, they are more likely to be drawn to that character. For example, a young character trying to find their place in the world in a coming - of - age short story.
One factor is their development. A character that grows and changes throughout the short story can be considered the best. For instance, if a selfish character becomes selfless by the end, it shows a great arc.
The ability to drive the plot forward is also important. A character who makes things happen, like a detective in a mystery short story constantly uncovering clues, is a great character. Their actions keep the story moving and keep the reader engaged.