Hiyori Kotobuki

Original Name (Japanese): 寿 日和
Romaji Name: Hiyori Kotobuki
Nicknames: N/A
Series: Saikin, Imouto no Yousu ga Chotto Okashiinda ga.
Age: Unknown
Weight: Unknown
Height: Unknown
Date of Birth: Unknown
Blood Type: Unknown


Hiyori Kotobuki is an eccentric and mischievous character. She has a strong desire for intimacy and physical affection, and often makes bold sexual advances toward the male protagonist, Yuuya. Despite her angelic appearance, Hiyori displays a playful and sometimes childish demeanor, suggesting an underlying loneliness or unfulfilled desires. She is determined to achieve her goal of reaching the gates of heaven, which drives much of her behavior throughout the series.


Hiyori is the lost spirit of a young girl who died but was unable to reach the gates of heaven and attain eternal peace. It is suggested that in order to cross over, she must first build a series of “steps” made from the “contentment fluids” that accumulate in Mitsuki’s heart-shaped “chastity belt” gauge. To fill this gauge, Hiyori must either engage in intimate activities with Yuuya while possessing Mitsuki’s body, or perform perverted acts on Mitsuki’s body.

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Hiyori has a delicate, angelic appearance with red eyes and long orange hair. She often appears in a white dress or other angelic attire to emphasize her otherworldly nature. When possessing Mitsuki’s body, Hiyori’s appearance remains largely the same, except for minor changes to adapt to the host’s physical form.


Hiyori’s primary ability is her ability to possess Mitsuki’s body, allowing her to interact with the physical world and pursue her goals. During these possessions, Hiyori maintains control over Mitsuki’s actions and speech, though the extent of her abilities within the host’s body has not been fully explored.


Hiyori’s origins are not entirely clear, but it is evident that she is a supernatural being, a lost spirit trapped between the mortal world and the afterlife. Her connection to Mitsuki and her desire to reach the gates of heaven serve as the central driving forces behind her actions and involvement in the series’ narrative.

Hiyori Kotobuki – FAQ

Here are 6-8 FAQs about Hiyori Kotobuki from “Saikin, Imouto no Yousu ga Chotto Okashiinda ga”:

Who is Hiyori Kotobuki?

Hiyori Kotobuki is one of the main characters in the light novel and anime series “Saikin, Imouto no Yousu ga Chotto Okashiinda ga”. She is the younger sister of the protagonist, Yuuya Kotobuki, and is described as having a cheerful and energetic personality.

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What is the relationship between Hiyori and her brother Yuuya?

Hiyori has a very close and loving relationship with her brother Yuuya. She is very fond of him and often tries to spend time with him, much to his embarrassment. Hiyori looks up to Yuuya and sees him as a role model, and she is protective of him and his well-being.

What are Hiyori’s hobbies and interests?

Hiyori is shown to have a variety of hobbies and interests. She enjoys cooking and often prepares meals for her brother. She is also a big fan of anime and manga, and is knowledgeable about several series. In addition, Hiyori is interested in the occult and has a tendency to believe in supernatural phenomena.

What is Hiyori’s role in the story?

Hiyori plays an important role in the story, serving as a source of support and encouragement for her brother Yuuya. She often provides comic relief and adds to the lighthearted nature of the series. Hiyori’s interactions with Yuuya and her attempts to get closer to him drive much of the plot and character development.

How does Hiyori’s character develop throughout the story?

Throughout the series, Hiyori’s character evolves quite a bit. While she starts out as a somewhat clingy and exaggerated younger sister, she gradually becomes more mature and self-aware. Hiyori also learns to balance her affection for Yuuya with respect for his personal boundaries, resulting in a more well-rounded and nuanced portrayal of her character.

What is Hiyori’s relationship to the other characters in the series?

In addition to her close relationship with Yuuya, Hiyori has various relationships with the other characters in the series. She is often at odds with Yuuya’s childhood friend Miu due to their competing feelings for him. Hiyori also interacts with other supporting characters, such as her classmates and the members of her club, and these relationships further develop her personality and role in the story.