I think that, if Harry had been a girl, (s)he would have had a much better relationship with Snape. Snape would have looked at “Harriet” and seen Lily, not James. He wouldn’t have crushed on her (don’t be gross, people!), but instead he would have seen someone he wanted to take under his wing and protect - even if it meant dropping his double-agent role and directly confronting Voldemort. He could’ve been a real hero, instead of an antihero - if only that one detail in the plot was different.
(not respinsible for shitty photoshop job this time ~Taiga)