Ohaguro-Bettari is a yōkai defined by her near-faceless visage featuring only a mouth with prominently blackened teeth. This core design persists across adaptations with minor attire variations. In the 2007 anime, she resides in Yōkai Yokochō with long gray hair, wearing a two-layered kimono—a velvet red outer layer with black trim—paired with an orange obi, geta, and white tabi socks. The 2018 iteration maintains her faceless appearance and gray hair but updates her kimono to velvet red with black and red trim and a yellow obi.

Narratively, she appears in multiple anime series. The 1968 anime includes brief appearances in episodes 7 ("Ghost Train") and 10 ("The Great Yōkai War (Part 1)"). The 2007 series positions her frequently within Yōkai Yokochō's community. In the 2018 adaptation, she boards the Ghost Train to frighten a human character and later congregates at GeGeGe House with other yōkai during efforts to expel Agnès from the forest, listening to discussions about conflict repercussions involving Backbeard.

Her abilities center on an enhanced bite, enabling powerful attacks that inflict severe pain and pierce durable materials like Furu-Tsubaki's roots.

Originating in Japanese folklore, Ohaguro-Bettari manifests as a nearly faceless entity in bridal attire, distinguished by blackened teeth. Historically, ohaguro teeth-blackening during Japan's Heian and Edo periods marked married women. Folklore interpretations propose she may be a mischievous shapeshifting animal spirit or the ghost of a woman barred from marriage due to perceived ugliness.