Gengorō Ōnabara

Gengorō Ōnabara (大宇奈原 厳呉郎, Ōnabara Gengorō) was once an instructor at the Shinigami Academy. After the death of a great majority of the Gotei 13's personnel and after the onset of the Soul Society Civil War, he is recruited to be the Captain-Commander of the Gotei 13.

Appearance
Gengorō is a noticeably tall, bespectacled man, being nearly twice as tall as Genryūsai Shigekuni Yamamoto, with a bald head and brown eyes. He wears a different outfit than most Shinigami, perhaps due to being a former instructor at the academy; an attire he keeps after becoming the Head Captain. It consists of a gray tunic, black hakama, and a black version of the captain's haori, along with a golden necklace that he wears around his neck.

Personality
Gengorō is a well respected, self-confident, and humble Shinigami, who is well known in the Seireitei for his spectacular teaching in the Shinigami Academy. His teaching skills have managed to produce Captain-level students, such as Renji Abarai and Izuru Kira, who both became captains shortly before he too was invited into the Gotei 13 to be a captain. He isn't as condescending or hard-nosed as his predecessor, as shown when he congratulates his students for their accomplishments, but at the same time expresses his expectations for them in the upcoming semester; showing that he has high standards for his students.

Like his predecessor, he is rarely surprised by much and can remain calm and collected in all but the most shocking of situations. He also follows the law of Soul Society to the best of his abilities, but is not above giving mercy to those whom he deems it worthy; a trait not present in Yamamoto. He also holds a once a month tea time for the First Division, believing it to be key in Division unity.

History
When Genryūsai Shigekuni Yamamoto founded the Gotei 13 and the Shinō Academy, two millennia before the start of the series, Ōnabara was one of the few selected by him to lead the academy.

Ōnabara was the Head Teacher of Class 1 of the first year students and in this capacity, was the teacher of Momo Hinamori, Renji Abarai and Izuru Kira when the three of them first joined the Shinō Academy. On their first day, he gave a welcome speech to the students of Class 1, praising them for their success and telling them of the expectations placed upon them.

He was also the teacher of Makoto Kibune, who went to him to seek answers for why the Gotei 13 refused to recruit Kibune despite Kibune being a top student. Ōnabara replied that while it is true that Kibune was a top student but that grades were only part of the equation and that Kibune must learn what he lacks on his own.

Inventions
Fake Hollows: During his days as an instructor, he invented fake Hollows to test his students in their combat prowess. These Hollows ranged in power from standard level, all the way to the Adjuchas-class.

Powers & Abilities
Master Hand-to-Hand Combatant: Due to being one of the founding members of the Shinō Academy two millennia ago, it is safe to say that Ōnabara is highly versed in hand-to-hand combat. As a teacher, he is well versed in the various hand-to-hand combat techniques that are taught there, having invented a few of them himself.
 * Ikkotsu (一骨, "Single Bone"): A powerful punch developed by Yamamoto. Using this technique, Gengorō can deliver enough force to completely crush the chest of a Vasto-Lorde class Hollow or destroy an entire building.


 * Sōkotsu (双骨, "Double Bone"): Being stronger than Ikkotsu, it is a powerful two-fisted punch created by Yamamoto.  The attack in one blow can totally destroy an opponent.


 * Keikotsu (系骨, "Triple Bone"): A far more complex technique that is stronger than both Ikkotsu and Sōkotsu, it was invented by Gengorō himself. This technique is the strongest of the three because of it's make up; it is composed of Hanki (反鬼, Reverse Demon), a Kidō technique that not only nullifies other kidō but also other techniques by sending one of opposite speeds and power, as well as speed. First Gengorō coats his arms with Hanki. He then unleashes a speedy barrage of his fists on the foe, with the strength of Sōkotsu. This causes a temporary negation of all active techniques around him as well as hitting the foe with the force of several Sōkotsu attacks, making it fatal to most anyone hit by it.

Kidō Master: It has been stated that he is even more proficient with Kidō than the previous Captain-Commander and possibly the leader of the Kidō Corps. This is because his primary subject in the Shinigami Academy was Kidō, which he taught and practiced for nearly two thousand years. Aside from mastering normal Kidō, he can also preform healing Kidō, and has even managed to invent some of his own.
 * Omeshi (お召し, Summoning): With this kidō technique, he can summon various objects such as paper, books, swords, or other things that he has charmed with Kidō.


 * Various Charms: Like Isshin Kurosaki, Ōnabara is well versed in Kidō charms. In the academy, he charmed the books and tests of his students, causing them to explode should a student try to cheat. He also charmed various supplies and weapons so that they could be summoned by his Omeshi technique.

Massive Spiritual Power: Being one of the oldest members of Soul Society, Gengorō possesses an exceedingly powerful reiatsu. It has been stated by Captain Renji Abarai that he has the most powerful reiatsu of any captain currently in the Gotei 13, and even exceeds that of a Vasto-Lorde level Hollow, which are said to be stronger than Captains.

Master Inventor: During his days as an instructor, he invented fake Hollows to test his students in their combat prowess. These Hollows ranged in power from standard level, all the way to the Adjuchas-class.

Zanpakutō
Sō-Kyōtei (教程総, Textbook General): In it's sealed state, it takes the form of a modified katana, which is slightly curved near the guard. It has a turquoise hilt and a circular guard. In his days as an instructor, he rarely carried it around.
 * Shikai: Not Yet Revealed.
 * Bankai: Not Yet Revealed.