Shamiko is a girl with long red hair, reaching about half her torso, and a small figure. Since Episode 1 (and Chapter 1), she has a pair curled horns growing from both sides of her head, and a long, slender black tail which ends with a heart-shaped triangular point. Her tail is often used by the people around her to gauge her emotion due to its expressiveness.
Her default outfit is her school uniform, which consists of a white and blue blouse, a blue checkered skirt, black tights and brown footwear.
Yuko is described by her family and friends to be weak physically, mentally and emotionally, and to have no innate talent whatsoever. As an individual who has lived in a household cursed with poverty, she has become accustomed to difficult living situations. Additionally, she has a strong appetite and passion for food, which is often used to negotiate with her.
Though she is a demon by blood, she has no sense or skill in combat or manipulation. It has been stated she has no malicious intent and her greatest emotion other than having a feast is her desire for "everyone to get along".
Despite the many challenges against her, she remains resilient and does not give up.
- The name Yuko means "excellence, superiority, gentleness" (優) (yu) and "child" (子) (ko).
- Yuko's surname Yoshida means "lucky, good" (吉) (yoshi) and "field, rice paddy" (田) (da)
- Yuko is Half Japanese and half Mesopotamian on her fathers side.
- She is incredibly cute.