Post pics of rikuo in yokai form...u'll win lots of props......!!!!!!!!

Rikuo's yōkai blood normally awakens at night time, during which he undergoes a drastic transformation. In his yōkai form, Rikuo is significantly taller compared to his human form. His eyes narrow and turn red. His hair grows long, he loses his glasses and his voice deepens.
His appearance resembles that of Nurarihyon and Rihan in that his hair is long and protrudes out the back of his head. Like Nurarihyon, the top, boven half of his hair is white while the bottom half of his hair is black. Always, his yōkai form is seen with a blue mantel over a black kimono zōri.

Midway through transforming into his yōkai form, Rikuo temporarily retains his human form's outfit. His hair grows longer and turns black and white, although not as long as his fully transformed form. He also appears taller than his human form, but still shorter than his full yōkai form.