Why Are Both of Them Your Names

"In other words..." Vizet patiently listened to Harry's account. "Peter Pettigrew's traces never showed up on the Marauder's Map."

"Right!" Harry nodded repeatedly, handed the Marauder's Map to Vizet, and said, "Professor Lupin tried lots of methods, but Peter Pettigrew's traces never appeared."

"So Professor Lupin thinks... after Peter Pettigrew got in touch with Voldemort, he also revealed the secret of the Marauder's Map, and that's why it can't show his traces."

"There's one more strange thing!" Hermione added from the side. "After Peter Pettigrew was caught..."

"Because he was still in the form of a rat, Professor Lupin and Sirius cast magic to try to turn Peter Pettigrew back again."

"I solemnly swear that I am up to no good!" Vizet picked up the Marauder's Map and tapped it lightly with his Wand. "But that failed too... right?"

"That's right!" Ron took over. "Peter Pettigrew refused to transform back the whole time. It wasn't until Sirius choked him so hard he couldn't breathe that he changed back to his original form on his own."

As he said this, the disgust on Ron's face grew more and more obvious. Clearly, everything he had gone through tonight had shaken him badly.

"Thank you for the clues..." Vizet looked at the Marauder's Map. Peter Pettigrew's name had not appeared on it. "What if we add a little extra help?"

The Obscurus Core began to pump, and Ancient Magic Power surged out. He followed the momentum and chanted the spell, "Revelio! Peter Pettigrew! Peter Pettigrew!"

Peter Pettigrew's name truly did not appear on the Marauder's Map;

More than ten minutes ago, the Aurors had arrived at Hogwarts on Flying Broomsticks, bringing Sirius and Peter Pettigrew into a tower, where they were locked up separately for questioning;

If the Marauder's Map was functioning normally,