Battling addiction is a team effort. Those who are suffering do not suffer alone, nor do they recover from addiction single-handedly without any support. Though there may only be one person who is exclusively victimized, the effects of substance dependence spreads far beyond one target. While some individuals may react more negatively than others to the family affair, others may respond with more supportive intentions of preserving the family.
For further details on these roles reference the original blogpost The Roles We Play: Addiction Family Roles Explored.