Bon is a main character in this horror anime series, and she is portrayed as a young girl with a distinct appearance. She has purple eyes and purple hair that reaches her chest, which she often wears in braids.

Bon comes from a family with a significant spiritual heritage, as her family has operated a shrine for generations that has been responsible for sealing away supernatural creatures. This background forms the foundation of her role in the story, where she actively works to confront and contain ghostly phenomena. Her mission is to seal away the supernatural, a task she undertakes alongside her close companion, a quiet boy named Koko who is described as being shut off from most people except for Bon. Together, this pair forms a central team that joins forces to deal with the various eerie occurrences that arise.

Within the narrative, Bon and Koko are depicted as protagonists who are well-liked by their classmates and often take on the role of helping others who are in distress. Bon is shown to be a proactive and determined individual, as seen in an episode where a spirit impersonates Koko and she takes it upon herself to uncover the truth. In this instance, it is ultimately Koko who resolves the situation by confronting the spirit directly, indicating that while Bon is a key player, the children rely on different strengths to face their supernatural challenges. The series focuses on the unsettling feelings and hidden threats that children often sense, and Bon is consistently at the forefront of these encounters, using her family's legacy and her own courage to push back against the darkness.