Race: Vampire

Age: 18

Birthday: April 24 (Taurus)

Blood type: AB

School Grade: 3rd year High School Student

Height: 180 cm

Weight: 64 kg

Eye color: grey

Hair color: black

Favourite food: soup

Disliked food: strong-flavoured food and drinks

Hobby: puzzles

Relatives: Kou (Adoptive brother), Yuma (Adoptive brother), Azusa (Adoptive brother)

Ruki Mukami is the eldest son of the Mukami household. He is known as the 'Brains' of the Mukami family. Ruki is a handsome young man with ruffled, short hair colored with black on top and white on the edges. He wears the black web chokers on his neck. He has grey eyes and also three black piercings on his right ear. Ruki has two big scars on his back from when he was a child. He is sometimes seen carrying a book.