No one is expecting him to be awake at four in the morning. No one, in fact, is expecting him to be awake before around seven in the morning, it appears. The dorms' silence is only broken by the soft snores, and the common room doesn't have even that.
Percy's in his element.
"Follow me! Stick together, first years! No need to fear the troll if you follow my orders! Stay close behind me, now. Make way, first years coming through! Excuse me, I'm a prefect!"
Victor looks around to double-check that everyone he knows is safe.
—well Dayo seems to not be anywhere visible but perhaps she's just in that mass of Slytherins over there, and the fact that Millicent Bulstrode seems to be looking around worriedly isn't important.
Muninn takes off, does a quick circuit of the room, and lands on Victor's shoulder again. "Not here," he says quietly.
...he could get in very big trouble. Or be eaten by a troll.
But so could Dayo.
He hesitates.
"I don't know. But Dayo isn't here and I'm afraid she might be in danger."
He looks around for Professor McGonagall.
Nowhere in sight—in fact, most Professors are gone, probably after the troll. The students make their way out of the Great Hall.
...he could leave it up to the teachers. But the teachers don't know that Dayo isn't here, and if he's going to do the stupid thing he had better do the stupid thing as soon as possible if he wants to find Dayo and warn her instead of finding Dayo and watching her be eaten by a troll. And Muninn, much as Victor respects him, does not seem equipped to be of much use if he arrives alone mid-troll-encounter.
"...I'm going to go looking for her," he says to Ron.
"All right. This way," he says, and he heads out at the end of Percy's trail of students and then ducks into a side corridor - "Muninn, find Dayo -"
But on the way to finding Dayo he might just see Snape, separated from the other teachers, going in what seems to be the direction of the third floor.
- something with the forbidden corridor, presumably. Maybe he's afraid someone sent the troll after it. Well, if they did, then Professor Snape can deal with the troll and Dayo will be safe when Victor finds her.
And Victor, after looking around for other hiding spots and finding none, ducks into the bathroom.
Dayo points her wand at them when they walk in but lowers it when she recognises them. "—oh hi. Erm. This was probably a bad idea."