Because I think they look horrid. >.< They are perfectly fine the way they are. I'll never get why people would change character designs of characters, they supposedly like so much. Mila having long hair, Momiji short hair, Helena having pink hair and Bayman being a ginger... It just doesn't fit them at all. Sometimes it even goes completely against their character. Would Helena really dye her hair pink? Here in Europe only confused, old grandmas and some punks/emos would do such a thing), not dignified young women. There often actually is a meaning behind certain physical attributes a character is given by the character designer. They are not only supposed to look cool, flashy and pretty.