My friend wants to dye her hair...

Tell her to try a temporary hair dye in her desired color and keep it in for a few days, make sure she asks for opinions and that she also tries various hairstyles with it. if she(and everyone else)is pleased with it, then she has the ok to go for the permanent, if its the other way around, she can simply wash it out and either go on to a different color o keep her natural color. i know my method is encouraging hair dying, but if the color doesnt suit her, at least this way she doesnt have to live with that mistake for the siguiente año o so.

well does she know that red hair is the most rarest natural hair color in the human race? why would she want to give up the rarest natural hair color in the human race?

Tell her it will fuck up her hair and it will start falling out because dye is bad for your hair I would know my hair is pink/purple

Well if shes a ginger then i say let her.