Originally Posted by
Animus Silvanna
Yeah but where is the rule that states that "Unique" characters must be alone? Just would like fore personal reference of-course.
There is no rule. However, there is no rule that a unique character can join units, either. It all comes down to whether or not the model in question has the Independent Character rule. As page 110 says, special characters like Crowe are unique, even if they don't specifically have the unique rule printed in their entry. Page 5 of the BRB FAQ, in turn, specifies:
Q: Do models classified as unique count as characters? (p63)
A: Yes, but not in the case of vehicles (with the exception of Bjorn the Fell-handed).
Note, though, that a unique model counts only as a character - not an independent character. Thus, a unique model cannot join a unit unless it explicitly has the Independent Character rule. Crowe is an example of a unique model that doesn't have Independent Character, and thus he cannot join a unit - even though, as a unique model, he is a character, and thus can participate in challenges, make precision shots/strikes on to-wound rolls of 6's, etc.