Kakine Teitoku

Kakine Teitoku (垣根 帝督) is one of the seven Level 5 espers, ranking second after Accelerator and is the leader of SCHOOL, one of the many underground factions.

Personality
He shares a rivalry with Mugino Shizuri, team leader of ITEM and Level 5 esper. He strives to become the strongest, even if it means to kill off Accelerator. He's also a ruthless, cocky, and cold hearted individual, though at times he may show mercy. When attempting to find Last Order to draw out Accelerator he attacks and tortures Uiharu and was on the verge of killing her when she refused to get him Last Order's location; but when attacking Takitsubo Rikou to eliminate ITEM's crucial person, he decided to let Rikou go if she's not going to be a threat as Rikou was on the verge of self-destruction from over-use of her ability, instead of killing her himself.

In his fight with Accelerator, it was noted Kakine probably also went through tragedies like the kind Accelerator went through, just one among the countless that has happened. Kakine seeks to be the Number 1 Level 5 so he can have the right to communicate with Aleister, something Accelerator doesn't use, for reasons related to his own tragedies.

Plot (Toaru Majutsu no Index)
He was the "spare plan" for Aleister Crowley's secret project in the event that Accelerator would not meet Crowley's expectations. He did not like the idea and tried to eliminate Accelerator but failed.

The first time when he is mentioned in volume 15 is when Mugino Shizuri and ITEM assault the District 5 Virsu Isolation Center. ITEM encounters SCHOOL there, and are presumably able to kill the Goggles Boy before being forced to retreat, leaving behind both Frenda and Kinuhata Saiai. While escaping, Shizuri reveals that Teitoku was with SCHOOL at the destination and defeated her.

The first time Kakine is seen in person, it is revealed that he has managed to obtain the Pincet Glove. He explains that he plans to use the glove in some way to get close to Aleister. He is then ambushed by "The Professor", the leader of MEMBER who uses a type of nanomachine called "Mimosa" to attack him. "The Professor", believing he has won begins to gloat about his victory to Yoshio Baba. However, Kakine reveals that he is still alive and proceeds to kill "The Professor".

Later, he learns the true capability of his power and "awakens", after which he gains three pairs of wings (like a seraph) and acquires flight capabilities and greater proficiency with his manipulation of Dark Matter. He is able to corner Accelerator, but Accelerator manages to update his AIM field and add Dark Matter to the list of things he can control. Accelerator then proceeds to hold an advantage even using Dark Matter against Kakine. Accelerator then also "awakens" and finally defeats him, destroying most of his body. Later is revealed that his hatred and envy towards Accelerator was set to make him to fight Accelerator and help Accelerator to growth.

He is currently being kept alive by "Dark Legacy", where his brain is preserved as a constant source of Dark Matter.

Abilities
The angelic nature of his ability is described as "He who wields a piece of the Heaven that is inhabited by God", and just like Accelerator, Aiwass has shown great interest in the now torn apart body of Kakine.


 * Dark Matter (未元物質), is his esper ability which allows him to create an unknown material that he uses to attack. It should be noted that the term "Dark Matter" is not to be confused with the true "Dark Matter" which is among the components of the universe. In addition, 'unknown matter' here does not mean matter that has not been discovered by humans but matter that did not exist until it was created by Kakine. The material he creates defies the Laws of Physics. His Dark Matter can even strike Accelerator with his power of Redirection, though after Accelerator taken into account 'normal' physics don't work on Kakine's ability he re-calculated and managed to reflect Kakine's Dark Matter later. During his fight after watching Accelerator's 'Awakening' he learned the real nature of his own powers and the origin of them noticing that they came from another dimensional plane and then his wings growth to a size of about 30m, but just before he could use his recently understood powers he got defeated by Accelerator.


 * Pincet Glove: Is the claw that Kakine wears on his right hand, it is the tool he uses to to grab nano-sized matter. Kakine used it to capture Underline, the nano-machine which Crowley used to monitor Academy City. It should be noted that the glove was originally large in size, but Kakine modified it by "only leaving the truly necessary parts" greatly diminishing it's size and weight.

Trivia

 * Fans usually depict Kakine in various works as a man - or in rare instances, a brain with three pairs of wings - inside a refrigerator. This is a reference to how his brain was restored by Aleister Crowley in order to utilize his esper ability beyond his death.