Doug Billings, who goes missing in the movie, is played by Justin Bartha.
booboo
he boy with the mulberry colored birthmark goes missing, we never learn his name however.
Crystal
Stu
The full name of the person who goes by JJJ on Twitter is James Johnathon Jerkyl. This person is a famous singer and rapper, but goes by the name JJJ as it is easy to remember.
Gofer
Pilgrimm.
Yasmin Lee
Anja Leuenberger from Switzerland!
Stew
A person goes to a seminary to become a priest.
Either baptist or Muhammad