In her previous existence, Kurumi was a hamster who experienced an adventure after escaping from her cage. However, she became lost and ultimately perished due to starvation. As a result of this traumatic event, she now fears hunger. Her name signifies "walnut," and her image is depicted in yellow. In the anime, Kurumi retains her hamster instincts, which drive her to consume large quantities of food to prevent another instance of malnutrition. Her hairstyle resembles a hamster's ears, while her mouth shape mirrors its mouth. She frequently concludes her statements with "Nano." Kurumi is among the initial three angels presented in the series and holds an intermediate rank.