Miyori Sonoda attends elementary school alongside the protagonist Wakaba Himeji. She possesses long black hair and favors a light blue dress. Miyori initially engages in bullying Wakaba, specifically targeting her due to Wakaba's ability to see supernatural entities invisible to others. This behavior exacerbates Wakaba's social isolation and distress, forming a key aspect of the peer conflicts Wakaba endures.

Miyori participates in and instigates bullying incidents throughout the narrative. These conflicts subside following intervention by Pupipo, the supernatural protector of Wakaba. Pupipo's involvement mitigates the bullying, enabling Wakaba to better navigate her social challenges. Miyori's character remains anchored in her elementary school context and initial antagonistic role toward the protagonist.