After moving into town with his son Blue, Heimdall is seduced by Talia White. They have an affair, and Heimdall unknowingly gets Talia pregnant. Talia keeps the pregnancy and gives birth to a son, Jack, although Heimdall is not told and everyone is led to believe that Jack is actually Layton's son. Some time after Jack is born, Talia visits Heimdall and breaks it off with him, parting ways with one final kiss. The next day, Heimdall is found dead in his home, the cause unknown.
- He was named after Heimdall, the god of foresight, from Norse mythology.
- This is also referenced in his surname, Horner, as Heimdall owns a magic horn that he is destined to blow to announce the coming of Judgment Day, or Ragnarök.