Yomi has light tan skin with golden eyes. Her medium-length black hair is worn up in a short straightened ponytail held with a red and white ribbon and a gold bells with tassels hanging from them. Her thick bangs and forelocks frame her face, and highlighting her hair is midnight blue coloring.
- Ame and Yomi are the third pair of characters to share the same brand. Preceded by Luciko and Aidee, and Michaco and Es.
- Yomi refers to herself as "boku" instead of the feminine variant "atashi". "Boku" is how young boys or tomboyish girls refer to themselves.
- She has a 'cat mouth' when she smiles.