Answer:
pronunciation, vocabulary, syntax, grammar
Explanation:
pronunciation is the way words are said, the author may give some one a southern twang ("Maawma") or an Irish accent ("M'ammy") can show financial status, and even race.
vocabulary can be unique to moments with different characters, using simple happy words for a child (running through the house, smiling from ear to ear) scary words for a monster or bad guy (pacing in the hallways, a grin splitting his face)
syntax can show how the thought process of the reader should be about this character, and how the character thinks themselves. dramatic/tense (looked left,then right. Scanning the area. double checking every thing he saw) humorous/whimsical (his head bobbed to this side, than that side, this side than that, this than that, this than. Quite a lot for a man not searching such a dangerous place. However he was in need of throwing his head around every corner.)
Grammar and syntax are similar in what they show. Are there a lot of short to the point sentences? (He ran.) Run on sentencing, lots of commas and semicolons? (He ran at full speed, because that was the only way to run for him; the soil underneath his feet couldn't fuss at him.")