- Characteristics: Originally had yellow hair with red tips, but the curse turned it black with grayish-brown tips. His eyes were a gradient of yellow and red, but have become an eerie gradient of red and black. He used to wear a white, flame-patterned sleeveless haori, but it turned black due to the curse. While everyone else's uniform buttons are yellow, the buttons on the cursed, evil Rengoku's uniform are black. He absolutely hates smiles. Therefore, he has no intention of ever smiling. His personality has become like that of a demon. 20 years old. - Height & Weight: 177cm, 72kg. - Favorite Food: Sweet potatoes. - Hated Things: Smiles, joyful expressions.