If they aren't on the same battle.net account you should be able to add account B from account A (fx: acctA(AT)gmail.com adds acctB(AT)gmail.com on battle.net - It's ingame).
If they are on the same battle.net account you should have someone else invite both to a group and let him leave the group when both of your characters are in the group.
Problem is the accounts are on 1 battlenet account.Toons are in same faction. Anyway one can take away 1 of the wow acc and put it on a new craeted battlenet acc.
Problem is the accounts are on 1 battlenet account.Toons are in same faction. Anyway one can take away 1 of the wow acc and put it on a new craeted battlenet acc.