"Kotobuki is a key character in the manga ""Straying Under the Demon’s Influence."" She is a young girl with long black hair and a serious demeanor. Kotobuki possesses special abilities that allow her to sense demons, making her an important asset to the protagonist's demon-fighting group.

Kotobuki is initially introduced as a mysterious figure, with a lack of backstory or personal history. It is gradually revealed that she was raised in a monastery in the mountains, where she was trained in the art of demon slaying. Despite her tough exterior, Kotobuki has a compassionate heart and a deep sense of justice.

Throughout the manga, Kotobuki is an instrumental member of the demon-fighting group, working tirelessly to help her companions vanquish evil spirits. She is incredibly skilled in hand-to-hand combat, and her sharp senses make her a formidable opponent.

Despite her serious demeanor, Kotobuki also has a playful side, often teasing her fellow comrades in lighthearted moments. Her personality is complex, and her interactions with the other characters in the manga showcase her multifaceted nature.

It is evident that Kotobuki is deeply committed to the cause of fighting demons and protecting humanity. Her dedication and unwavering devotion make her a valuable member of the team. Overall, Kotobuki is a complex, skilled, and intriguing character in ""Straying Under the Demon’s Influence,"" and she plays an important role in the overall narrative of the manga."