The elephant's reaction to fear of humans might not be what you expected though? Do they flee humans more often than they charge?
What they found was that the animals ran from the human sounds much more than the lion sounds; and elephants and rhinos ran particularly fast: https://www.cell.com/current-biology/fulltext/S0960-9822(23)...
That said, elephants are smart, and have been known to seek out human camps for medical attention when injured: https://www.itv.com/news/2016-06-03/wounded-elephant-shot-by...