LOG: Peter Pettigrew
As usual, Peter does nothing during the meeting besides look between his friends and wonder what Remus was thinking about this 'guest'. Upon the instruction that the Marauders had to go to Hogwarts, Peter's heart sank a bit and knew that it was not going to be a fun time but kept his displeasure to himself and nodded his head expectantly- Dumbledore asks, Dumbledore receives.
When Regulus comes in, Peter absolutely freezes: This man was supposed to be dead. He was quick to look at Sirius, then James and then finally at Remus, trying hard to find a reaction that he found comforting. He then settled on himself and gave Regulus a flick of the fingers as if to say 'hello' and went back to staring at his hands.
When the meeting is called to an end, Peter was quick to stand by his friends and not say much: this was a time when he was absolutely best at observing.