Which character in Circle 8, Bolgia 8, provided false counsel to Boniface?

Guido da Montefeltro is the correct choice because he is depicted in Dante's Inferno as a figure who provided false counsel to Pope Boniface VIII. He is a former military leader who, upon seeking forgiveness, was persuaded by Boniface to pursue a deceitful path. In this encounter, Guido reveals the consequences of his actions, illustrating the theme of the corrupting influence of fraudulent advice and the moral complexities of seeking redemption and guidance. His admission of guilt and the pivotal role he played in misleading Boniface highlight the severity of the sin of fraudulent counsel, which is a central aspect of the experiences faced by the souls in Circle 8 of Hell. The narrative underscores the impact of false advice on both the advisor and the individual receiving it, serving as a cautionary tale regarding the importance of integrity in one's counsel.