What common error in sentence construction is evident in this example? comma splice run-on sentence sentence fragment missing conjunction

Plz change it i can not change this sentences .

1. imaginary persons in a novel believable characters 2. characterization long prose narrative 3. real in the fictional world of the novel creation of characters 4. the novel world of fiction 5. world of the novel characters i need the answer

What do you call a person who is mean in school?