[quote=@Crimson Flame]
Well the fact that Finn is 18, Daniel is 16, Ciel and Marcel are in their twenties… How would they know each other? :hmm
[/quote]

Just to list off Ciel's connections... 

*Ciel knows Daniel and became friends with him because she babysat him when she was in high school and he was in elementary/middle school (eight year difference).

*Ciel knows Malcer from High School, became friends, and stay friends online until Bartholomew isolated Ciel from her friends and family. 

Maybe that can give you ideas?