I think it would be in an oxford English Dictionary
Some people can gain weight by eating more calories than they burn.
⇒ <span>Antagonist:
1. An opponent or enemy in a story
</span>⇒ <span>Protagonist:
</span>1. The main character in any story, such as a literary work or drama.
<span>2. </span>A leading person in a contest; a principal performer.
<span>3. </span>An advocate or champion of a cause or course of action.
Rainsford is the protagonist in the story.
B. That's when I realized the door had locked behind me.
Hole this helps! :)