Keiji has short, messy black hair and blue eyes. He tends to wear an emotionless or slightly exasperated expression a great majority of the time but is shown to smile occasionally given the circumstance. He wears glasses. He is currently working as an editor in a shōnen manga magazine from a major publisher, although he actually wanted to be in the literature department. He is calm and composed most of the time, usually choosing not to show a wide range of emotions.