Severus Snape, an important character in the Harry Potter series and a double agent of the Order of the Phoenix, is a mixed-race and his mother comes from the ancient potion family Prince. ), so the signature on his potions notebook is The half blood of Prince. By the way, this is Harry's mother's childhood playmate, who has been secretly in love with her all her life, and is a rare and affectionate tragic figure. (My professor~~~~~)