Females in Anime

As anime matures over the years, so do the characters. There is always that so called "villain," and the protagonist. However, one character that seems to always be changing is the collection of females. They are becoming more flamboyant, more showy, more lude. Though, there remains stereotypes between them; lolitas, the brutes, the fake red heads, the petite, quiet ones, etc. What do these character creations, that are seemingly apparent in most animes nowadays, say about our society and the way we are evolving as people?