Sirius was sentenced without trial to life in prison in Azkaban for betraying James and Lily Potter to Lord Voldemort and murdering their friend, but Harry didn't care at all, he respects him with all his heart. Sirius would always give him advice and he would always believe it. “I doubt it… I know her reputation and I'm sure she's not a Death Eater,” Sirius said (JK Rowling chapter 14 p. 302). Throughout the story, Sirius was there to help Harry make better decisions, to guide him and protect him against the dark lord Voldemort. As the story progresses, his emotion keeps changing from passion to recklessness because of the Prophet. “Hermione said Sirius was getting reckless locked in Grimmauld Place… the Daily Prophet would think his brain was inflamed if they found out he knew how Voldemort felt” (JK Rowling chapter 15 p. 383-384). Throughout the book “Harry Potter and the Order of the Phoenix” (JK Rowling), the characters showed their true characteristics and goals, either to help or challenge Harry Sirius has always been there for Harry to help him. against the wizard who attempted to execute him Harry Potter became a household name in the wizarding world when he was just a baby, after successfully repelling an attack from the infamous Lord..