Responses
it's a design choice trope & shortcut. like how silver/white hair is paired with distant, chilly, and otherworldly personalities, red hair is chosen for fiery, impulsive characters. it's also a way to make characters slightly more distinct, which can be helpful for readers with facial blindness or artists with "same face syndrome." but if it's made into live action, those choices almost always get tossed. so the reality equivalent isn't red, it's just black or dark brown. at most, they might have some bleaching that's made their hair a little lighter/coppery. so don't take it as an actual slight on redheads please!
Author: How much pain do you want this MC to have?
Editor: YES.
BRUH. He is already dealing with something then this effing red head (ANOTHER RED HEAD the stereotyping is consistent) comes in to add more. Jeez.