As the title says, this is a commission for
This is her OC Mei Sirena, daughter of a siren, I believe.
This was the picture I used for reference: [link] and she does have blue streaks in her hair, you just can't see them here.
EDIT: If you're a Monster High fan please visit my new page just for MH customs:
Monster High (C) Mattel
Mei Sirena belongs to
Doll made by me