Heisuke Shishiba is a character from the manga series 'Sakamoto Days.' He is a professional assassin who works for the Order, an organization of elite hitmen. Shishiba is known for his calm demeanor and exceptional combat skills, often wielding a sword with deadly precision. Despite his occupation, he has a strong sense of honor and prefers not to kill unnecessarily. Throughout the series, Shishiba often finds himself at odds with Taro Sakamoto and other characters, leading to intense and strategic battles.