Steven Miller is a human friend of the Troi family whose son Wyatt was bonded in childhood to Deanna Troi, bringing both families to the Enterprise-D at Haven.
Steven Miller appears in Haven. He and his wife Victoria were close to Deanna Troi's late father, and in keeping with Betazoid custom their son Wyatt was genetically bonded to Deanna when both were children.
When Wyatt comes of age, the Millers beam aboard the Enterprise-D for the wedding. Steven is the calmer of the two parents, trying to keep the peace as Victoria and Lwaxana Troi quarrel over whether the ceremony will follow human or Betazoid tradition.
The wedding never takes place. Wyatt, a physician, recognises a woman aboard an approaching Tarellian plague ship as the figure he has dreamed of all his life and chooses to join her people, leaving his parents to accept his decision.