A Magical Roleplaying Experience 

 #20525  by Sirius Black
A grinning face sat in the fire, framed by a wild mane of long dark hair. "About time you noticed," he said, still grinning. "I was beginning to wonder if someone had cast a disillusionment charm on me."
 #21230  by Harry Potter
Harry had to blink several times to ensure he wasn’t just seeing things, that he really was staring into the face of his godfather in the dancing flames of the fireplace.

“Sirius!” said Harry still in shock though he was grinning from ear to ear. “How’d you get in there? Actually-nevermind that. How are you? “
 #21456  by Ron Weasley
"How'd you get in there? Mate it's called Floo Powder. Remember Diggory's Dad?" Honestly-" but of course Harry was already on the next topic. Still, Sirius ought to have some news from the Order, right? Ron leaned in next to Harry.
 #21472  by Sirius Black
They talked through the night, taking turns insulting Dolores Umbridge, the mysterious Educational Decree, and of course, Harry's scar. He had to admit, it concerned him, and he had in fact informed Dumbledore. But Dumbledore's express words were to keep Harry in the dark, and keep Sirius locked up, and of course the escaped criminal with nowhere else left to go had to listen.

As wonderful as it was to see his godson again (ignoring the ache of his knees on the cold stone of the kitchen) his spirits quickly waned. He'd offered to meet them in Hogsmeade, just like last year. But they - Harry - didn't want to see him. Harry practically shouted at him to stay put. He could clearly see now that he was seeing a confused teenage Harry Potter, and not his best mate, risk-taker and loyal James.

"Well I'd better get going," he stated with a note of terse finality. "I can hear Kreacher coming down the stairs. I'll write to tell you a time I can make it back in 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.