Arguments for Snape being a good guy in Deathly Hallows Part 2:
* His sacrifice: Snape ultimately gave his life to protect Harry and the prophecy, willingly becoming a martyr for the cause of good.
* His love for Lily: Snape's actions were driven by his lifelong love for Lily, and his desire to protect her son, even though he hated James.
* His role in the prophecy: Snape's actions, from joining Dumbledore to protecting Harry, all played a vital role in fulfilling the prophecy and ultimately defeating Voldemort.
* His loyalty to Dumbledore: Snape was fiercely loyal to Dumbledore and followed his instructions, even when they were difficult or painful.
* His remorse: Snape showed genuine remorse for his actions as a Death Eater and his role in Lily's death.
Arguments for Snape being a complex character, not necessarily a "good guy":
* His bullying of Harry: Snape was cruel and abusive to Harry throughout their school years, which cannot be easily excused, even if he was protecting Harry.
* His history as a Death Eater: Snape's past as a Death Eater, even if he later regretted it, cannot be ignored. He committed terrible acts and caused harm.
* His manipulation of Harry: Snape used Harry's vulnerability and grief to his advantage, manipulating him to do his bidding.
* His lack of empathy: Snape often lacked empathy for others, particularly those he deemed inferior, like Neville Longbottom.
Ultimately, it's up to each reader to decide whether Snape is a "good guy" or a complex character.
He is undoubtedly a morally ambiguous character, with both good and bad qualities. Snape's redemption comes through his sacrifice, but his past actions and behavior cannot be easily dismissed. His character represents the complexity of good and evil, and the power of love and loyalty.