Boy in Wolf Man Mask
This kid is a small, orange haired boy in a green shirt wearing a Wolf-Man mask. He was captured by a snare trap set up by Dan, who mistook him for the Wolf-Man due to his mask. He was presumably trying to trick or treat at Casa Paradisio.
It is unknown how long Dan held him captive, as he was screaming for help and for his parents when Chris arrived.
Chris eventually arrives, and, realizing what's going on after hearing the kid screaming, eventually convinces Dan to let him go. He is also scolded by Chris for trick or treating alone.
After being let go, he kicked Chris for his role in the event, before walking off to never be seen again.
Boy in Yeti Mask
Another child seen shortly after the above, he is blonde, short, chubby, and wears a blue hoodie and grey sweatpants with orange sneakers. The boy was attempting to trick or treat at the Apartment 7, Casa Paradisio neighboring apartment]]. Immediately after letting the first kid go, Dan sees this child and once again mistakes him for the Wolf-Man(though, as Chris points out, it is in fact a yeti mask) and chases him down.
The child then ran down the street, screaming for help, and removing his mask (which Dan mistook as him reverting to human form). He continued screaming, which finally got the attention of a police officer.
It's unknown what exactly happened to him, as the scene cuts away, though presumably the Police stopped Dan before he was grabbed.
A group of other Trick or Treaters. A boy dressed as a pirate, a girl dressed as Zorro, and a boy dressed as Dracula (specifically the Bela Lugosi version).
Nothing else is known about them.