Les Amis are still building the barricade when these two weird looking kids just show up and everyone kinda assumes they are Gavroche's friends until he walks up and is like "who the hell are you?"
The guys give the kids a closer and while they are a little confused why they chose to bring wooden stakes to a gun fight, the kid's combat gear and one of them wearing a red bandana is enough to convince Les Amis that these are just more revolutionary gamin turning up to the battle.
By the time it's time to start fighting, one of the new boys is trying to convince Gavroche to don a crucifix while the other one has taken to portioning out what appears to be a huge jug of water into a bunch of empty wine bottles Grantaire left about the cafe.
But just as Courfeyrac has started to usher the last of the revolutionaries out to the barricade and Combeferre tells them to load their weapons, another young kid comes running up the street, out of breath and wearing an horrendously bright outfit that Jehan audibly gasps in awe at.
The kid stops and frantically addresses the two new boys: "Edgar! Allen! I waited on you for like an hour before Michael mentioned he saw you all the way over here! What are you doing?!"
Irritated and ready to get on with the revolution, Enjolras snaps "These citizens are here to fight the national guard!" at the exact same moment Edgar and Allen answer with "We're here to fight the vampires!"
They quickly turn to the other party with confused faces. Before anyone else can say anything, a voice comes from the dark alley next to them: "Did someone mention vampires?"
"Oh dearest Montparnasse! You shouldn't have come, I know how you dread the sunlight so!" cries Jehan as he rushes to the shadows of the alley pushes through the small gang standing with Montparnasse to throw his arms around the criminal.