Yuuka Teramoto is the youngest member of the idol group ChamJam, commanding attention with her long indigo hair and matching eyes. Her signature look features a teal dress, a matching tie, and a flat ribbon head accessory. Possessing a bright and straightforward personality, Yuuka is nonetheless challenged by poor memory and forgets things easily. While she sometimes struggles to read social situations, her genuine nature resonates with fans, earning her 3rd place in the group's internal popularity vote.

Yuuka demonstrates particular skill in dancing among the members. Her hobbies include playing social games. She shares a notable relationship with fellow member Aya Yokota. Though their interactions receive limited focus, moments of closeness occur, such as holding hands during a train ride. The exact nature of their bond remains ambiguous within the narrative, open to interpretations ranging from a deep friendship to a potential romantic connection.