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Heart-sama (ハート様, Mr. Heart) is the most prominent antagonist among Shin's four lieutenants.
He is an extremely fat man. His stomach absorbs the blow of every martial art, except Nanto Sei Ken. Usually he is gentle and good-natured. But, when he watches blood of his own, he runs berserk with rage and massacres those around him.
He was defeated by Kenshirou. His death cry was "Hidebu!." ("Debu" = "fat man")