Himari Noihara is a bakeneko, a shapeshifting demon cat, and the female protagonist of the series. She appears to Yuto as his bodyguard to protect him from the ayakashi out of an ancient oath set by her ancestor, who was spared by one of the Amakawa's heads after he refused to kill her. She is known to other ayakashi as the 'Crimson Blade of Noihara' due to her expert swordsmanship, and refers to herself as the "sword that protects" Yuto. She is usually seen wearing traditional Japanese clothes and always wears her hair in a long ponytail with a large pink bow to hold it in place and speaks mostly in an archaic and overly polite way. She is very close to Yuto, whom she refers to as "Young Master", It is shown that she loves him dearly, and is very flirtatious with him because she and Yuto got along well in Noihara in the past when she was a white cat. This flirting often annoys Rinko to no end. In spite of this, she is also very serious about her duty as a bodyguard, and is willing to protect Yuto from harm by any means.
She is a kind spirit who loves her master