Answer and explanation:
Assuming this would be a description for little kids, I think it'd be briefly direct and easy to just say that her work is creating make up for adult women, like moms. In order to do so, she tries her best to find the best products out in the market so her make up products are just as good.
Krystal could make a comparisson saying that she works like a beauty scientist since creating make up takes a lot of lab time, and one has to be smart to work in those areas.
Also, she can create infinite types of perfumes and lipsticks, of every colour and every fragance, so that women can look even prettier everyday.