Sirius looked out of the fire at Harry, a crease between his sunken eyes.
“You’re less like your father than I thought,” he said finally, a definite coolness in his voice. “The risk would’ve been what made it fun for James.”
“Look —”
“Well, I’d better get going . . . I’ll write to tell you a time I can make it back into the fire, then, shall I? If you can stand to risk it?”
There was a tiny pop, and the place where Sirius’s head had been was flickering flame once more.

Did you like question ten, Moony?" asked Sirius as they emerged into the entrance hall.
"Loved it," said Lupin briskly. "Give five signs that identify the werewolf. Excellent question."
"D'you think you managed to get all the signs?" said James in tones of mock concern.
"Think I did," said Lupin seriously, as they joined the crowd thronging around the front doors eager to get out into the sunlit grounds. "One: He's sitting on my chair. Two: He's wearing my clothes. Three: His name's Remus Lupin...

Get off me,” Harry spat, throwing Pettigrew’s hands off him in disgust. “I’m not doing this for you. I’m doing it because — I don’t reckon my dad would’ve wanted them to become killers — just for you.

And don't forget: Elvendork! It's unisex! - James Potter

With another shock of excitement, Harry saw Sirius give James the thumbs-up.
Sirius was lounging in his chair at his ease, tilting it back on two legs. He was very good-looking, his dark hair fell into his eyes with a sort of casual elegance neither James's nor Harry's could ever have achieved, and a girl sitting behind him was eyeing him hopefully, though he didn't seem to have noticed.

Besides, the world isn't split into good people and Death Eaters. We've all got both light and dark inside us. What matters is the part we choose to act on. That's who we really are.