Karasuba, Sekirei No. 04
Height: 174 cm
Weight: 59 kg
Three sizes: B 85 / W 63 / H 91
Ashikabi: Natsuo Ichinomi
Norito: This is the pledge of my blade, exterminate the sworn enemy of my Ashikabi!
Karasuba, Sekirei #04, leads the 'third generation' Disciplinary Squad.
She is also known as the "Black Sekirei" and "MBI's dog." In the past, Karasuba was part of the "first generation" Disciplinary Squad and teamed up with Yume in the "second generation" Disciplinary Squad. She seems knowledgeable about Musubi's past and many aspects of the Sekirei Plan due to her job and long-standing presence, similar to Miya, Matsu, or Kazehana. Karasuba and Miya Asama have a tense relationship (Miya forbids her from entering Izumo Inn) and tend to almost fight at each other's sight. Her name (karasu+ba) means "raven feather" literally.
Karasuba still wears the uniform all members of the first generation of the Disciplinary Squad were equipped with: a tight black leather top, a miniskirt, and stockings. Over her shoulders, she wears a gray cape with the Sekirei Crest printed on it. She has long dark blonde hair and narrow gray eyes.
It appears that Karasuba desired to fight and defeat Yume and resents Yume for "disappearing" before they could settle their rivalry. This unresolved matter influences Karasuba's actions throughout the story and her behavior towards Musubi, who received Yume's Tama at some point. She maintains a "friendly" relationship with Musubi (whom she calls "Mu-chan"), and they promised to be the last two Sekirei standing. She gets easily excited when meeting a strong opponent and wants to cut down other Sekirei to release some steam. Karasuba believes humans are weak and insignificant and looks down on them (though she surprisingly gets along well with her Ashikabi). She seems very bloodthirsty, attacking and terminating two Sekirei (Mitsuha and Ikki) because she feels like it.
Not much is known about Karasuba's strength except that she uses a Japanese Long-Sword and is feared by many Sekirei. Matsu once stated that if Miya and Karasuba fought, half of Tokyo would be destroyed. The only shown fighting scene so far was against Mitsuha, who was no match for her and got easily terminated. Seeing this, the fairly powerful Akitsu decided to flee. Unlike Miya, who can split a battleship while at a distance, Karasuba needs physical contact with what she attacks.
Karasuba is the only steady member of the Disciplinary Squad throughout all generations. Like all members of the first generation Disciplinary Squad, she was adjusted by Takehito Asama. During her time with the first generation, she participated in the fight on Kamikura Island. There, she is seen cutting down a retreating soldier, holding his bloody corpse with her right hand and wielding her sword in the left, refusing to let the invading troops retreat. She asks if they really thought they could leave after invading the island.
