Buffy also has crowning moments of selfhood/Slayerhood in Becoming, Part 2 as she's fighting Angelus.
Angelus: Now that's everything, huh? No weapons.... No friends.... No hope. Take all that away... and what's left?
Buffy: (catching sword blade between her hands) Me.
And then there's the bit a little later when Angel's soul has been restored but the end of the world is still going to happen. He's confused (doesn't realize that he'd been fighting Buffy) and reaches out for her. She soothes him and, knowing that it's the only way to save the world, runs him through with the sword and sends him to hell.
no subject
Angelus: Now that's everything, huh? No weapons.... No friends.... No hope. Take all that away... and what's left?
Buffy: (catching sword blade between her hands) Me.
And then there's the bit a little later when Angel's soul has been restored but the end of the world is still going to happen. He's confused (doesn't realize that he'd been fighting Buffy) and reaches out for her. She soothes him and, knowing that it's the only way to save the world, runs him through with the sword and sends him to hell.