"We've all got both light and dark inside us. What matters is the part we choose to act on. Sirius's face on the Black family tree was burned out by his own mother. Sirius called her a 'charming woman' to Harry.
Sirius Black is actually the biggest drama queen to ever exist ever— why so you think he didn't just grab the rat and run?~~ because he wanted to be more dramatic that's why "Only one will die tonight!" Instead of "The rat is going to die"