Shiki Ichinose is an Oni and a Child of the Kishin, as well as a student at Rasetsu Academy.

Shiki is a rebellious teenager of average height and build with tousled, pointed, blue-black hair. He has blue eyes, beneath his left eye towards his ear there are small twin moles. He sports the standard Rasetsu uniform and does not wear accessories, even in casual wear. Shiki appears to be average height.

Whenever his horns are visible, they extend upwards. Most similar to bovine horns, seen on antelopes, cows, goats and sheep.

Shiki has a rough, confrontational attitude and can sometimes be vulgar in the way he speaks to others. He has a huge interest in weaponry, especially firearms. Although he's confident and likes to appear tough, Shiki is aware of his own weaknesses and has learned to accept criticism as an important part of his growth. Originally focused on getting revenge for his father's death, Shiki's empathy and interest in developing relationships with others has given him a new direction.