Nymphia Winds colour choice refers to her skin colour. There's black people, brown, white, red, yellow etc and Asians are what is refered to as yellow. Nymphia chose it for herself so don't be offended on her behalf.
7:00 Shes trying too hard to be quirky. Thank you for saying that I felt bad feeling it. Its weird to say someone's "trying to hard" but she seems like shes trying to be both violet chachki and katya at the same time and doing both poorly. Just doesn't seem genuine.