Homuha Kouzuki

Kou’s twin sister and resident tsundere vampire. She is a comically cruel, cold queen who is commonly concerned with insulting or physically attacking others (especially Kou). In spite of her arrogance, she is embarrassed with her lack of knowledge of modern society and has Erika explain it to her. Unfortunately for her, Erika is a conspiracy theorist.

Though she secretly owns an extensive collection of romance novels, she becomes extremely flustered when it comes to her own romantic possibilities.

Personality
Homuha feels very little empathy for others, especially those whom she deems as "peasants". She mixes powdered infant blood into her tea and is responsible for the deaths of dozens. In other words, she puts the "cute" in "execute"!

Book Collection
Due to her disdain for the common human, she spends her downtime at school reading novels. She collects every book she finds about older brother-younger sister romance, including 114 books written by her favorite author Sora K. These books include Big Brother Knight, Big Brother Pirate Captain, and Big Brother Tax Accountant.

"What? Tax law is very convoluted!"

Main Cast

 * Kou Kouzuki - Older brother
 * Erika Chougasaki - Best friend
 * Anna Anatolyevna Popova - Classmate and enemy
 * Katsura - Maid
 * Nyao - Teacher

St. Joseph's Holy Academy

 * Mizuki Mizuki - Classmate (Likes)
 * Sachiko Kanemoto - Classmate (Dislike)
 * Joy Ichijou - Classmate (Dislike)
 * Seiko Horii - Classmate (Dislike)
 * Yui Ono - Badminton club senpai (Likes)

Family

 * Bein Kouzuki - Father
 * Maya Kouzuki - Mother
 * Chie Kouzuki - Younger cousin

Etymology
Homuha means "passionate wings". Passion as in intense emotion, including love, anger, determination, jealously, and so on.

Kouzuki means "October".

The Spoiler Zone
Don't click expand if you haven't beaten the game. Come on, be cool.

Magical Abilities
Homuha has inherited a very unique set of abilities from her parents. She has not been seen using most of her abilities outside of Inversion Impulse.

Shapeshift (変化, Henka) - Homuha possesses a very immature form of the ability Shapeshift. She can only use it to lengthen or retract her hair. Initially she cannot use this power outside of Inversion Impulse, but as the story progresses, she is able to use her hair to play sports.

Plunder (略奪, Ryakudatsu) - She can create a cursed field, sapping the life force of any living being within her field of vision. However, the effect is very weak without Caging Hair. Of her immediate family, only Kou lacks this ability.

Caging Hair (檻髪, Origami) - A peculiar ability originating in East Asia. After grabbing a target with her hair, she can Plunder their lifeforce, killing them in seconds if they are a normal human. The target will feel like they are being restrained by white-hot chains and experience a hallucination of seeing charred and blistered skin where they are being drained. Besides Homuha, only her father possesses this ability in her family.

Against beings such as Heroic Spirits or True Ancestors, Caging Hair would be as annoying as a large spider web. But in theory, she would be able to restrain such beings with outside help.

Reality Marble: The World (固有結界・世界, Koyū Kekkai: Sekai) - The ability to duplicate the world around oneself and "stop" (decrease to near 0) the flow of time for a number of seconds. Some beings with similar abilities or significant Mystery may still be able to move with varying degrees of success.

Mystic Eyes (魔眼, Magan) - She can theoretically incur states such as paralysis or hypnosis in others just by looking at them. However, her powers are immature, and due to her bloodline's affinity with Plunder, she only instinctively understands how to Plunder.

Physical Abilities
Dead Apostle Constitution (死徒体質, Shito Taishitsu) - Due to her father's status as a Dead Apostle Ancestor and her mother's superior quality as a Dead Apostle, Homuha also enjoys superior genetics. Normally, she is far stronger than other teenage girls, but under Inversion Impulse there is not a living mortal who can match her. (However, she could be bested by humans who wield weapons or abilities granted by gods and spirits.)

If they have a food source (i.e. blood) Dead Apostles are able to heal their wounds by reverting the time of their body.

During the course of the story, Homuha can be seen catching bullets with her fingers, kicking cars like soccer balls, kicking blades of air that can destroy buildings, and surviving explosions.

Talents
She has world-class talent in playing the violin and doing ballet. Her flexibility is on par with olympic gymnasts.

She has received advanced black belts in various martial arts. She has achievements in Kendo that are considered "once in a century", giving her the title of "Black Haired Princess of the Blade".

She plays badminton recreationally.

End spoilers.