separating

This guild tends to fracture into groups of size 6.

Separating: Fracture at the minimal size of 7, throw a dice for the size of the fraction. Join when the total size is less than 7.
Normal: Fracture at the minimal size of 13, throw two dice of the size of the fraction. Join when the total size is less than 13.
Throw dice for which hero will join the leaving group. Friends will normally stay together in one group.