No relation to Lawndale High teacher, Timothy O'Neill. An agent for a MiB type of government agency who was sent to investigate a crashed alien spaceship in the first story of Mother's Love, remaining in Montana under cover as a local sheriff's deputy to observe Daria and her daughters. Later, he and Daria fall fall in love and marry.
He also is a central character, along with Michael Fulton and John Lane in the multiple crossover story, "Three."
First introduced in the story, Alien Pond.