Kakashi Hikaru

Kakashi Hikaru is a Shinigami, the former captain of the 10th Division and is the current Lieutenant for the 11th Division. Due to being a former captain, he retained knowledge of Bankai and is quite proficient with it. He is also the one who taught the current 10th Division Captain how to achieve Bankai.

Appearence
He appears as a middle aged man with spiky gray hair, a black Shinigami robe and his zanpakuto on his waist.

Personality
He is more cheerful yet laid back outside of missions and compassionate to others and has a chronic tardiness problem. At times Kakashi tends to push everyone away, though he means well. Kakashi acted as a brotherly figure to Ryun, Tora and Sanji, often giving them helpful advice when needed. He rarely shows any excitement towards anything in his daily life. Kakashi shows no arrogance; rather is very modest about his abilities. His naturally calm attitude is used to his advantage in battle as it is easier for him to maintain his composure to stay focused on the situation at hand and ultimately notice everything around him. Through this, he can make keen and thought-out decisions allowing him to stay steps ahead of his opponents. Despite his strong belief in cherishing and protected loved ones, Kakashi's personal life is almost non existent beyond his life as a Shinigami and has shown no signs of attempting to make friends or find love.

Backstory
Kakashi became a Shinigami just like all others. After his academy training he went on to become the captain of the 10th division which he held for many years. During this time he met Ryun, Tora and Sanji and began to teach Ryun how to use a Bankai. He then administered Ryun's captain's proficiency test, which Ryun passed and Kakashi gave Ryun his seat as captain of Squad 10. Kakashi then became the Lieutenant of the 11th division.

Second Coming of Aizen Arc
He has not been shown in this arc.

Powers and Abilities
Vast Spiritual Power: Just like most Captains (or in this case, former captains) he has an immense amount of Spiritual power giving him the edge against many opponents.
 * He can focus his spiritual energy into a beam of lightning similar to a cero blast. He calls this attack Centella (lit. lightning).

Master Swordsman: He uses Kido in his sword fights as he coats he sword in Kido energy in order to make the blade stronger than it already is though this seems to drain his energy rather quickly. He can fight on par with most captain-level opponents.

Mild Kido User: He is able to use kido to some degree, although it is not very useful.

Zanpakutō
Raikoutaishou (虹霞, Lightning General): an average katana with a simple rectangular hand guard and greyish-blue hilt.
 * Shikai: It's release command is "Fry them all". Upon which, it becomes a large black battle ax capable of doing heavy damage. The axe is heavy ,however, and causes him to move at slow speeds.
 * Bankai: After saying "Bankai", a large black dragon appears behind Kakashi. His zanpakuto itself doesn't change at all. The dragon shoots large arc of lighting at Kakashi's opponents and is able to overwhelm most captain-level opponents, however, the lighting requires 2 full minutes to charge up again. He can only remain in bankai for around 10 minutes, meaning he can use this blast only 5 times.

Quotes

 * "If I'm still sane by the time they finish their training, it will be a miracle!"
 * "Think before using a Bankai... or it could be used against you."
 * "I won't allow my comrades to die! I'll protect you with my life. Trust me."