Ebisu Kouichi AKA Bisuko is the leader of the Kuzugami Group in the Manji Empire. He is also the boss of Tenzen High in Tokyo, Machida. He has ruled Tenzen since his 2nd year. He is considered the strongest fighter in all of Manji. Being the Strongest Man in the strongest and largest gang in all of Japan, Bisuko is considered by most (especially in The Manji Empire) to be the pound for pound strongest delinquent of his era.
When Bisuko was a senior in middle school, he single-handedly beat up 12 guys from Nishi Mid who were waiting for him by the station. After beating them, he sat on one of them and started reading his favourite manga, Urakin, laughing the whole time.
Bisuko has already shown his extreme strength. Easily defeating Himekawa Kei, leader or the Front of Armaments Flying Column and KKK Demons with only one punch when Kei and his team traveled to Tokyo to enrage Ebisu's fellow Manji 7 Head, Hiruma Yuushi.
Kouichi was forced to go to Toarushi himself to collect Hiruma, who had went to get revenge for his defeated friends and Manji Sub group, the Ikeshima Brothers. In search for the T.F.O.A hideout, he met Hana Tsukishima at a restroom. After helping Hana with his toilet troubles, he stumbled upon Suzuran High and tried to remember where he had heard of the school before. Bisuko finally arrived at the Armament base where he found Hiruma had fought to a draw with the Head of the E.M.O.D, Maekawa Muneharu.
Bisuko, along with his fellow Manji 7 members would fight the 7 men from Toarushi who came to Tokyo to finish the the long grueling war with the Armament and the EMOD. He is the last to fight and he defeats the Front of Armament's head, Murata Shougo. Bisuko later travels back to Toarushi to return Mary-nii's Umbrella that he borrowed the day he met Hana, and to secretly challenge him to a fight. The fight between himself and Hana was very close with Bisuko just coming out on top of their one-on-one, with Hana commending his new friend's monstrous strength. Despite fighting him, Bisuko holds Hana in high regard.
Even though Bisuko barely won his fight with Hana, rumors still spread around his hometown Machida that he had actually lost. Although initially people dismissed it as rumours, but when Manji strong men Karashima Jun and Shibaki Masami heard, they believed Bisuko might have actually lost as they both could atest to Hana's strength, aswell as Bisuko arriving in Machida with a messed up face. This led to people in Machida believing Bisuko really lost. This initially didn't bother Bisuko at all, considering it as an opportunity to shed his "Boogie" man persona in the eyes of everyone in town. However, after a couple of goons gunning for him catch wind of his supposed defeat , they decide to target Hana instead, this lead to Bisuko taking care of all of the thugs personally. Stating that he couldn't introduce any of them to Him. His friendship with Hana will last a lifetime.