Kotoha is described to be a beautiful, young woman, similar in appearance to her son, though Doma stated that she had a softer appearance compared to Inosuke. Kotoha has long hair tied up at the end as a bun and emerald green eyes.
Kotoha is kind and loving. She treasured Inosuke dearly and would always sing lullabies to him when he was a baby. Doma said she was very naive and stupid aside from her loving nature.
Kotoha gave birth to Inosuke at the tender age of 17 or 18 and fled from the abusive relationship she had with Inosuke's father. She loved her son immensely and raised him by herself, often singing songs and promising to protect him. In her final moments, she was apologetic to Inosuke for failing him as his mother and guardian.
Kotoha thought Doma was nice and trusted him, however, she discovered he was a man eating demon and fled, dying trying to protect her son.
Kotoha gave birth to Inosuke as a teenager. She escaped from the abusive relationship she had with Inosuke's father and stumbled upon a temple, taking refuge alongside a group of worshipping villagers. She lived there happily with her son until she suspected that the worshippers were being eaten by Doma. After accusing him of lying to his followers, she ran from the temple with Inosuke in her arms and tried to go through the forest, but was trapped by a cliff. In her final moments, she apologized to Inosuke for failing to protect him and tosses him into the river as an attempt to save his life. She was ultimately killed and eaten by Doma.