Cinnamon is one of the seven children who form the main cast of the anime The Marshmallow Times. She is a young girl easily recognized by her light blue hair, which falls to her shoulders and is often styled with blunt bangs and twintails secured with ribbons. Her eyes are a notable yellow color, and she is typically seen wearing a dress, which sometimes takes the form of a special outfit she uses for her favorite activity.

Cinnamon’s most defining trait is her deep and passionate love for fortune-telling. She frequently makes use of a crystal ball, attempting to predict the outcomes of various situations and adventures the group encounters. Her predictions are a recurring part of the group's dynamic, though it is noted that their accuracy can vary considerably from one instance to the next.

Beyond her interest in mysticism, Cinnamon possesses a unique fascination with things that are creepy, macabre, or wicked. This interest is such that she enjoys making unsettling things happen within her own room, embracing a quirky goth aesthetic that stands in contrast to the otherwise lighthearted tone of the series. This combination of a childlike appearance with a fondness for the dark and spooky is a key aspect of her personality.

Within the group of friends, which includes Sandy, Jasmine, Lime, Basil, Clove, and Nuts, Cinnamon has a specific role that ties directly to her abilities. As the team travels the world and works together as a journalism crew, she acts as a fortune teller. Her motivations often center on using her mystical interests to understand the world around her and contribute to the group's exploits, even if her predictions are not always reliable. Her relationships with the other characters are built on the shared adventures and the bond of their reporting team, with her unusual hobbies making her a distinctive member of the circle.