Kotetsu T. Kaburagi is a Veteran superhero whose old-fashioned ways and reckless attitude have been harming his carreer. He is the least popular among the heroes of Sternbild City and his company was taken over. Now he is forced by his new employers to become Barnaby's partner against his will.
Kotetsu discovered his powers when he was a young boy, and he immediately viewed them as a curse. He hated having powers and didn't know what to do with them, but one day during a bank robbery his anger and his powers started to well up inside him. However before he could use them, the only hero of Stern Bild City, Legend, appeared and saved the day. He saw that Kotetsu had powers and told him that they were nothing to be afraid of, that they could actually do a lot of good. Kotetsu's life turned around and he decided to devote his time to being a hero from then on.
Kotetsu went on to be the hero known as Wild Tiger, however he didn't want to follow the rules of the rest of the heroes, where he had to pay tribute to the advertisers while on camera or wait to save people for when a commercial is over. Because of this he ended up screwing several missions up, and he was always ranked low on the list of people's favorite heroes. His representative could no longer afford to keep him on, so the company went under and Tiger was bought up by another representative. He was given a new technologically advanced suit and was given a new partner as well. His new partner was the newest hero on the scene, Barnaby Brooks Jr, a hero who not only was far more popular than Tiger, but even had the same powers as him.