Nikolai has white layered, sharp hair swept to the left side of his face. However, as short as it seems, he also has a long braid of hair that often rests on his right shoulder. A scar is slit vertically down his left eye. Compared to his left eye, his right eye appears vacant, bearing no highlights in it. Nikolai hints that his eccentric persona may or may not be real. He always has a happy, yet sadistic smile on his face and loves to ask questions and quizzes. Bungo Stray Dogs character.