A young man coming from a family line valuing the tradition of bancho and ouendan, Ikki is renowned as Bernard's hot blood spirited leader of E Block. After practice one day, Ikki rescued a young puppy he named Katamaru, who was in the way of a car. Having shielded the puppy from the impact, however, he then fell unconscious due to his injuries, and woke up later, strapped to a bed. The man he awoke to, having performed heinous experiments on him, requested his allegiance, but Ikki immediately made a daring escape from the facility and that man's strong arms. Under heavy rain, deep sorrow, and having found his new friend Katamaru again, Ikki vowed that day, in the name of justice, that the man who cursed him with his wretched other self shall be righted by him as Brider, the Transformed Bancho.
