Formerly the captain of a newly implemented squad 14, Blaze was lazy, and not too willing to fight. However, when danger struck, he was serious, and took out his opponents fast. His bankai was unique. A fire elemental type
, he was able to utilize flames or destruction, and those of protection
. Even he, however, lost control of himself every once in awhile...the result...
It is believed that blaze mastered the flames completely before losing his powers, using his Final Form to save the Head Captain, whilst also cleansing the Soul Society, and alerting his squad mates to his position.
After a year without powers, Blaze was tired of sitting idly by. He took charge and began to search for methods of getting some form of power back. Because of his mastery over destruction and protection prior to loosing his SR skills, he is not power hungry, and understands the balance of things quite well.
Blaze soon ran into Urahara, who gave him hints, and ultimately helped Blaze discover Fullbring. Blaze began to practice his power on his own, and quickly developed it, though at the cost of dead thugs and such. When Blaze made it to his Complete FullBring for, no one was there to protect him from the blast. He saved himself. His FB ultimately reflecting his last moments as a Soul Reaper, he was able to control the blast, and regain control over his flames. He also sported a unique weapon, in which which weighs a lot. Luckily, it feels like an extension of his arm.
It is believed that Blaze changed his name to slip into society. Likewise, it could be because of the appearance he sports in his Fullbring form.