Technically Harry is a friend to snakes only because the piece of Voldemort that attached itself to him through the scar🤷🏽
Maybe that's just my interpretation of it. But like isn't the scar the last horcrux and by killing himself he killed Voldemort once and for all? https://youtu.be/5pEto5-qO1k?si=imz_87PD0qyR3WmF