I’m not sure what you mean but
Protagonist - Main Character
Antagonist - The obstacle the Main Character faces usually the villain or bad guy in the story but not always
Saturn has thirty-three moons.
Have is not the right verb for this sentence.
Also, thirtyhree is not a word. :)But, since thirty-three is one thing, it has a hyphen.
The dreadful oracle is that he would be killed by his grandson
This is depending on many cultures but it is mostly true