Yomi Isayama

Yomi Isayama is one of the main protagonist from the Ga-Rei anime and manga.

The close friend and sister-figure of Kagura Tsuchimiya, Yomi is an orphan adopted by the Isayama family and raised as one of its own, groomed to be the clan's heir from a young age and bestowed with its family sword, Shishio. Yomi tragically fell to darkness after being corrupted by the power of the Bane Stone (sesshōseki), and her descent into evil is the main focus of the anime series.

Appearance
Yomi is an attractive girl of medium height, possessing purple eyes and jet black hair that is as long as her waist and falls down over her forehead in a trimmed fringe. In the anime, just like Kagura, she is shown wearing her black and white school uniform most of the time, even donning it during her Vanquisher duties. Towards the end of her life her uncut Bane Stone could often be seen glowing in the middle of her forehead, signifying moments at which Yomi was in control of her own actions.

After her death and subsequent resurrection as a spirit, Yomi's appearance became far more demonic in nature, with serpentine eyes, the Bane Stone visible on her forehead and sharpened teeth. She no longer wore her school uniform in this state, instead almost always wearing a kimono and carrying a parasol on her.

Personality
Yomi is the sisterly figure for Tsuchimiya Kagura. She is good spirited and optimistic in the flashback of the anime. She lost her parents at a young age to spectres, and was taken in by Isayama Naraku, then head of the Isayama family. Yomi grew to love and respect her foster-father, and polished her skills to repay him for his kindness. Her efforts led to her inheritance of the priced Isayama heirloom, the sword Shishio, which held the spiritual beast Ranguren in it.

Abilities
Yomi was an extremely powerful and talented warrior, with speed, strength, agility and durability far surpassing that of an ordinary human or Ministry agent. Her speed was such that she could move from one location to another so quickly it appeared as if she was teleporting, deflect bullets with casual ease, and move across rooms faster than armed gunmen could react to her. She was capable of cutting through large Category B spirits with great ease using her sword, suggesting an immense level of physical strength. The highly skilled and capable squad of Seers, Section 4 of the Paranormal Disaster Countermeasure Headquarters, were slaughtered by Yomi with the utmost of ease in a matter of seconds.
 * Ranguren/Nue: Yomi's familiar, bestowed upon her by the Isayama family heirloom, the mighty katana Shishio. Ranguren is a large chimera possessing great strength and ferocity, along with the ability to fire a "Roar Wave" of destructive energy from its mouth with enough power to practically annihilate city streets. Nue can also fly, as can Yomi when in her familiar's proximity.

Trivia

 * A skilled swordmaster, she later became the very thing she fought to destroy.