Shiori presents as a notably short teenager with medium-length pink hair, usually arranged in low twin-tails adorned with decorative bows. Blunt, straightened bangs frame her light purple eyes, which consistently reflect a sleepy or subdued look.

Her personality centers on a keen awareness of her own cuteness, paired with a blunt and unfiltered way of speaking. She voices thoughts freely and shows little regard for her surroundings, leading to a sharp-tongued demeanor. This straightforward approach prioritizes self-expression over social expectations in all interactions.

The name "Shiori" uses hiragana (しおり) and carries no intrinsic meaning, though potential kanji interpretations include:
- 詩織 ("poetry" and "weave")
- 栞 ("bookmark," typically feminine)
- 撓 ("lithe" or "bending," typically masculine)
These variations imply thematic ties to literature or delicate traits.

Visually, Shiori shares similarities with Miruki from "PriMagi," including light pink hair, gentle eyes, short stature, and a personality emphasizing perceived cuteness.