Her name's Keiko, she's from a Yakuza family called "The White Oni", her Yakuza family is formed by lots of oni people like her, she's also an oni, she has a horn on her head, she had two but a enemy family cut off one of them.
For being an oni she doesn't have much powers, just an inhuman strength and resistance.
She has a tuned black motorcycle that has a box to keep all her weapons.
She has long blue hair with pink and green gradient, she's on a really good shape even having a marked six pack