[Raleigh]

Have you thought that maybe she used a shampoo with a dye? I forgot the actual name... I've used these products where you wash your hair and then apply it and there it goes away gradually if you wash it till they disappear after 8 weeks or so. Plus there are also sprays which are applied and then disappear completely after washing it. So maybe in the AyuReady episode she did so since she doesn't seem a fan of black. Plus black and reds always fades first especially if your hair has a tendency to change into a lighter colour. Mine - for example has a tendency to turn into a slightly orangish-blonde shade whenever I dye my hair.

Also I don't really think her hair is that damaged. Usually hairdressers ensure you get minimal damage by using less peroxide and using honey based dyes. And I'm sure she has professional hairdressers to take care of her hair not to forget that I believe she used wigs and extensions quite a lot and thus she might not dye her hair as much as we do believe. Also she cuts her hair quite frequently which helps to make your hair healthier.

Of course she might have days where her hair looks damaged but I think all of us have these days. And I'm sure her hair is more likely to be damaged than a person who has never dyed his or her hair however I don't think it is so damaged since she frequently cuts it and seems to take care of it.